To collet data automatically and improve the data acquisition success rate, the reasons of data acquisition failure are analyzed from the view of malfunction object, phenomenon and cause. According to statistical analysis and sampling inspection, it is concluded that the factors affecting data acquisition success rate mainly concentrate between the main station and the terminal and the terminal and energy meter. This paper analyzes several kinds of problems occurring between the main station and the terminal and the terminal and energy meter. Based on these analyses, a new method is proposed to improve the data acquisition success rate.