All laser pointing systems are subject to two fundamental pointing errors which are boresight and jitter errors. The beam can be accurately pointed to the target and the signal loss can be reduced during transmission if the effect of the two main pointing errors are mitigated. A new method of the laser pointing system based on a Gaussian far-field irradiance profile and a Gaussian jitter model is proposed, and which can get boresight error using the information of the return optical intensity without the return signal from sensors on the target neither scanning the target and get the error only 5　μrad. The experimental results successfully validated the feasibility of this method.