diff --git a/sanguo_orchestrator/__init__.py b/sanguo_orchestrator/__init__.py
new file mode 100644
index 0000000..737fc6e
--- /dev/null
+++ b/sanguo_orchestrator/__init__.py
@@ -0,0 +1,12 @@
+"""
+Sanguo Orchestrator Module
+Task coordination and execution management for Sanguo VeighNa platform
+"""
+
+__version__ = "0.1.0"
+
+from .task import TaskState, Task
+from .pool import TaskPool
+from .runner import Orchestrator
+
+__all__ = ["TaskState", "Task", "TaskPool", "Orchestrator"]
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diff --git a/sanguo_orchestrator/pool.py b/sanguo_orchestrator/pool.py
new file mode 100644
index 0000000..9141573
--- /dev/null
+++ b/sanguo_orchestrator/pool.py
@@ -0,0 +1,29 @@
+"""
+Task pool for managing multiple tasks in memory
+Provides task storage and status tracking (not actual multiprocessing)
+"""
+from .task import Task, TaskState
+
+
+class TaskPool:
+    """Manages task storage and status tracking"""
+
+    def __init__(self, max_workers: int = 2):
+        """Initialize task pool with maximum workers"""
+        self.max_workers = max_workers
+        self._tasks: dict[str, Task] = {}
+
+    def submit(self, task_id: str, task_type: str) -> Task:
+        """Submit a new task to the pool"""
+        task = Task(task_id=task_id, task_type=task_type)
+        self._tasks[task_id] = task
+        return task
+
+    def get_status(self, task_id: str) -> TaskState | None:
+        """Get task status by ID"""
+        task = self._tasks.get(task_id)
+        return task.status if task else None
+
+    def get_task(self, task_id: str) -> Task | None:
+        """Get task object by ID"""
+        return self._tasks.get(task_id)
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diff --git a/sanguo_orchestrator/task.py b/sanguo_orchestrator/task.py
new file mode 100644
index 0000000..6d0fcbf
--- /dev/null
+++ b/sanguo_orchestrator/task.py
@@ -0,0 +1,40 @@
+"""
+Task state management for Sanguo Orchestrator
+Defines Task state machine and transitions
+"""
+import enum
+from dataclasses import dataclass
+
+
+class TaskState(enum.Enum):
+    """Task execution states"""
+    PENDING = "pending"
+    RUNNING = "running"
+    DONE = "done"
+    FAILED = "failed"
+
+
+@dataclass
+class Task:
+    """Represents a task in the orchestrator"""
+    task_id: str
+    task_type: str
+    status: TaskState = TaskState.PENDING
+    result_id: int | None = None
+    error_msg: str | None = None
+
+    def start(self):
+        """Transition from PENDING to RUNNING"""
+        if self.status != TaskState.PENDING:
+            raise ValueError(f"不能从 {self.status.name} 启动")
+        self.status = TaskState.RUNNING
+
+    def complete(self, result_id: int):
+        """Transition to DONE with result"""
+        self.status = TaskState.DONE
+        self.result_id = result_id
+
+    def fail(self, error_msg: str):
+        """Transition to FAILED with error message"""
+        self.status = TaskState.FAILED
+        self.error_msg = error_msg
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diff --git a/tests/orchestrator/__init__.py b/tests/orchestrator/__init__.py
new file mode 100644
index 0000000..1e0ce1e
--- /dev/null
+++ b/tests/orchestrator/__init__.py
@@ -0,0 +1 @@
+# Tests for sanguo_orchestrator module
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diff --git a/tests/orchestrator/test_pool.py b/tests/orchestrator/test_pool.py
new file mode 100644
index 0000000..17beda2
--- /dev/null
+++ b/tests/orchestrator/test_pool.py
@@ -0,0 +1,62 @@
+"""
+Tests for sanguo_orchestrator.pool module
+Tests TaskPool task management
+"""
+import pytest
+from sanguo_orchestrator.pool import TaskPool
+from sanguo_orchestrator.task import TaskState
+
+
+class TestTaskPool:
+    """Test TaskPool initialization and task management"""
+
+    def test_task_pool_initialization(self):
+        """Test TaskPool initializes with max_workers"""
+        pool = TaskPool(max_workers=2)
+        assert pool.max_workers == 2
+        assert pool._tasks == {}
+
+    def test_task_pool_submit_creates_task(self):
+        """Test submit() creates and stores a new Task"""
+        pool = TaskPool(max_workers=2)
+        task = pool.submit(task_id="test_1", task_type="test")
+        assert task.task_id == "test_1"
+        assert task.task_type == "test"
+        assert task.status == TaskState.PENDING
+        assert "test_1" in pool._tasks
+
+    def test_task_pool_get_status_existing(self):
+        """Test get_status() returns TaskState for existing task"""
+        pool = TaskPool(max_workers=2)
+        pool.submit(task_id="test_1", task_type="test")
+        status = pool.get_status("test_1")
+        assert status == TaskState.PENDING
+
+    def test_task_pool_get_status_nonexistent(self):
+        """Test get_status() returns None for non-existent task"""
+        pool = TaskPool(max_workers=2)
+        status = pool.get_status("nonexistent")
+        assert status is None
+
+    def test_task_pool_get_task_existing(self):
+        """Test get_task() returns Task object for existing task"""
+        pool = TaskPool(max_workers=2)
+        submitted_task = pool.submit(task_id="test_1", task_type="test")
+        retrieved_task = pool.get_task("test_1")
+        assert retrieved_task is submitted_task
+        assert retrieved_task.task_id == "test_1"
+
+    def test_task_pool_get_task_nonexistent(self):
+        """Test get_task() returns None for non-existent task"""
+        pool = TaskPool(max_workers=2)
+        task = pool.get_task("nonexistent")
+        assert task is None
+
+    def test_task_pool_multiple_tasks(self):
+        """Test TaskPool can handle multiple tasks"""
+        pool = TaskPool(max_workers=2)
+        task1 = pool.submit(task_id="test_1", task_type="test")
+        task2 = pool.submit(task_id="test_2", task_type="test")
+        assert len(pool._tasks) == 2
+        assert pool.get_status("test_1") == TaskState.PENDING
+        assert pool.get_status("test_2") == TaskState.PENDING
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diff --git a/tests/orchestrator/test_task.py b/tests/orchestrator/test_task.py
new file mode 100644
index 0000000..ff7f8b7
--- /dev/null
+++ b/tests/orchestrator/test_task.py
@@ -0,0 +1,72 @@
+"""
+Tests for sanguo_orchestrator.task module
+Tests Task state transitions and validation
+"""
+import pytest
+from sanguo_orchestrator.task import TaskState, Task
+
+
+class TestTaskState:
+    """Test TaskState enum values"""
+
+    def test_task_state_enum_values(self):
+        """Test TaskState has correct enum values"""
+        assert TaskState.PENDING.value == "pending"
+        assert TaskState.RUNNING.value == "running"
+        assert TaskState.DONE.value == "done"
+        assert TaskState.FAILED.value == "failed"
+
+
+class TestTask:
+    """Test Task dataclass and state transitions"""
+
+    def test_task_initial_state(self):
+        """Test Task starts with PENDING state"""
+        task = Task(task_id="test_1", task_type="test")
+        assert task.task_id == "test_1"
+        assert task.task_type == "test"
+        assert task.status == TaskState.PENDING
+        assert task.result_id is None
+        assert task.error_msg is None
+
+    def test_task_start_from_pending(self):
+        """Test start() transitions PENDING to RUNNING"""
+        task = Task(task_id="test_1", task_type="test")
+        task.start()
+        assert task.status == TaskState.RUNNING
+
+    def test_task_start_from_running_raises_error(self):
+        """Test start() from RUNNING raises ValueError"""
+        task = Task(task_id="test_1", task_type="test")
+        task.start()
+        with pytest.raises(ValueError, match="不能从 RUNNING 启动"):
+            task.start()
+
+    def test_task_start_from_done_raises_error(self):
+        """Test start() from DONE raises ValueError"""
+        task = Task(task_id="test_1", task_type="test")
+        task.status = TaskState.DONE
+        with pytest.raises(ValueError, match="不能从 DONE 启动"):
+            task.start()
+
+    def test_task_start_from_failed_raises_error(self):
+        """Test start() from FAILED raises ValueError"""
+        task = Task(task_id="test_1", task_type="test")
+        task.status = TaskState.FAILED
+        with pytest.raises(ValueError, match="不能从 FAILED 启动"):
+            task.start()
+
+    def test_task_complete_transitions_to_done(self):
+        """Test complete() transitions to DONE and sets result_id"""
+        task = Task(task_id="test_1", task_type="test")
+        task.complete(result_id=12345)
+        assert task.status == TaskState.DONE
+        assert task.result_id == 12345
+
+    def test_task_fail_transitions_to_failed(self):
+        """Test fail() transitions to FAILED and sets error_msg"""
+        task = Task(task_id="test_1", task_type="test")
+        task.fail(error_msg="Test error")
+        assert task.status == TaskState.FAILED
+        assert task.error_msg == "Test error"
+        assert task.result_id is None
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