diff --git a/cocos/base/CCCamera.cpp b/cocos/base/CCCamera.cpp
index 7a2e00936d..f903249962 100644
--- a/cocos/base/CCCamera.cpp
+++ b/cocos/base/CCCamera.cpp
@@ -134,7 +134,7 @@ const Mat4& Camera::getProjectionMatrix() const
 {
     return _projection;
 }
-const Mat4& Camera::getViewMatrix()
+const Mat4& Camera::getViewMatrix() const
 {
     Mat4 viewInv(getNodeToWorldTransform());
     static int count = sizeof(float) * 16;
@@ -183,7 +183,7 @@ void Camera::lookAt(const Vec3& lookAtPos, const Vec3& up)
     setRotation3D(Vec3(CC_RADIANS_TO_DEGREES(fPitch),CC_RADIANS_TO_DEGREES(fYaw),CC_RADIANS_TO_DEGREES(fRoll)));
 }
 
-const Mat4& Camera::getViewProjectionMatrix()
+const Mat4& Camera::getViewProjectionMatrix() const
 {
     getViewMatrix();
     if (_viewProjectionDirty)
@@ -201,7 +201,7 @@ void Camera::setAdditionalProjection(const Mat4& mat)
     getViewProjectionMatrix();
 }
 
-void Camera::unproject(const Size& viewport, Vec3* src, Vec3* dst)
+void Camera::unproject(const Size& viewport, Vec3* src, Vec3* dst) const
 {
     assert(dst);
     Vec4 screen(src->x / viewport.width, ((viewport.height - src->y)) / viewport.height, src->z, 1.0f);
diff --git a/cocos/base/CCCamera.h b/cocos/base/CCCamera.h
index e0de3da16c..5beeffa734 100644
--- a/cocos/base/CCCamera.h
+++ b/cocos/base/CCCamera.h
@@ -118,15 +118,15 @@ public:
     *
     * @return The camera view matrix.
     */
-    const Mat4& getViewMatrix();
+    const Mat4& getViewMatrix() const;
 
     /**get view projection matrix*/
-    const Mat4& getViewProjectionMatrix();
+    const Mat4& getViewProjectionMatrix() const;
 
     /**
     * Convert the specified point of viewport from screenspace coordinate into the worldspace coordinate.
     */
-    void unproject(const Size& viewport, Vec3* src, Vec3* dst);
+    void unproject(const Size& viewport, Vec3* src, Vec3* dst) const;
     
     //override
     virtual void onEnter() override;
@@ -145,9 +145,9 @@ protected:
 
     Scene* _scene; //Scene camera belongs to
     Mat4 _projection;
-    Mat4 _view;
-    Mat4 _viewInv;
-    Mat4 _viewProjection;
+    mutable Mat4 _view;
+    mutable Mat4 _viewInv;
+    mutable Mat4 _viewProjection;
     Vec3 _up;
     Camera::Type _type;
     float _fieldOfView;
@@ -155,7 +155,7 @@ protected:
     float _aspectRatio;
     float _nearPlane;
     float _farPlane;
-    bool  _viewProjectionDirty;
+    mutable bool  _viewProjectionDirty;
     unsigned short _cameraFlag; // camera flag
 };