Abstract: To reduce the amount of upload data and improve the accuracy and flexibility of liquefied gas monitor system, a mobile liquefied gas monitoring system based on the weighted fusion algorithm was proposed. The fact that the weighted fusion is better than that of the arithmetic method, was proved by the comparison between them on MATLAB/Simulink. Then, data was collected from field, and was uploaded to the database in JSON type. The HTTP method was used to get data from the server by the terminal. The experiment shows that the system proposed in this paper reduce the amount of data and improve the accuracy. Meanwhile, it can guarantee the speed of data uploading which can reply to the emergency of explosion.