Abstract: To prevent the battery of pipeline crawler discharge excessively leading to shorten battery live, this article introduces a method of how to measure a battery voltage through the application of LM231 V/F converter to implement battery voltage measuring and controlling in real time. It includes hardware circuit and interrelated software and procedure. This method has a lot of strong points such as simple hardware, easy operation and can work steadily in bad circumstances such as high voltage and strong current strong interference etc.