The invention provides a phase shift focus monitor reticle, a manufacturing method thereof, and a method of monitoring focus difference using the phase shift focus monitor reticle. The method may include identifying an integration system comprising a first display processor and a first command processor. At least one service server is connected to the user’s mobile or fixed terminal via the global computer network, the communication network and the microserver. During calibration, actual data can be compared to a target expected to be obtained via an analog readout architecture.