In order to cope with the problems of daily increase in sales of coal products in Zhangcun Coal Mine, low efficiency of manual statistics on the day, and easy to produce wrong operations, this paper designs and develops a set of unattended intelligent cloud platform for coal sales based on Spring Cloud framework and intelligent cloud system for coal sales, combined with cloud computing, big data and artificial intelligence technology. By optimizing business processes, reducing labor costs, and improving management standardization and safety, the platform has significantly improved sales efficiency and economic benefits. The applicatin in Zhangcun Mine shows that the vehicle weighing time is shortened by 60%, the license plate recognition accuracy rate is over 98%, and the phenomenon of human error and cheating is effectively eliminated.