When charging the charging pile, the system may have various sudden failures, so real-time monitoring of the charging pile charging system and the protection of charging equipment is indispensable. If a sudden failure, the system can automatically cut off the power to protect personal safety. Charging piles are often distributed in various parts of the city, and they are unattended for a long time, so they must be reliable when used normally. The charging pile can make real-time record, storage and statistics of the charging user information such as login and exit, and at the same time, it can be convenient for the user to inquire conveniently as the basis of charging power and payment, etc. The charging pile can realize fast and non-destructive charging. The charging pile can realize fast and non-destructive charging, i.e. it can charge a large amount of electricity to the battery in a short time and avoid excessive damage to the battery. If we design a charging post that meets the requirements of users, we need to study the needs and problems of electric vehicle users for charging posts.