diff --git a/XplorePlane.Tests/Services/CncProgramServiceTests.cs b/XplorePlane.Tests/Services/CncProgramServiceTests.cs
new file mode 100644
index 0000000..0656f42
--- /dev/null
+++ b/XplorePlane.Tests/Services/CncProgramServiceTests.cs
@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using Moq;
+using XP.Common.Logging.Interfaces;
+using XP.Hardware.RaySource.Services;
+using XplorePlane.Models;
+using XplorePlane.Services.AppState;
+using XplorePlane.Services.Cnc;
+using Xunit;
+
+namespace XplorePlane.Tests.Services
+{
+    public class CncProgramServiceTests
+    {
+        [Fact]
+        public void SerializeDeserialize_SavePosition_PreservesSaveImage()
+        {
+            var appState = new Mock<IAppStateService>();
+            appState.SetupGet(s => s.MotionState).Returns(MotionState.Default);
+            appState.SetupGet(s => s.RaySourceState).Returns(RaySourceState.Default);
+            appState.SetupGet(s => s.DetectorState).Returns(DetectorState.Default);
+
+            var raySource = new Mock<IRaySourceService>();
+            var logger = new Mock<ILoggerService>();
+            logger.Setup(l => l.ForModule<CncProgramService>()).Returns(logger.Object);
+
+            var service = new CncProgramService(appState.Object, raySource.Object, logger.Object);
+            var program = new CncProgram(
+                Guid.NewGuid(),
+                "Program",
+                DateTime.UtcNow,
+                DateTime.UtcNow,
+                new List<CncNode>
+                {
+                    new SavePositionNode(Guid.NewGuid(), 0, "保存位置_0", MotionState.Default, SaveImage: true)
+                }.AsReadOnly());
+
+            var json = service.Serialize(program);
+            var deserialized = service.Deserialize(json);
+
+            var savePosition = Assert.IsType<SavePositionNode>(Assert.Single(deserialized.Nodes));
+            Assert.True(savePosition.SaveImage);
+        }
+    }
+}