Automatic cancellation method for meter of prepaid electricity-sell system

Provided is a cancellation method for a meter of a prepaid electricity-sell system. The method enables meter cancellation to be automated completely, and guarantees integrity and safety of data transmission and function achievement. The method includes that a user sends a meter cancellation request information table to a terminal server through a user interface device, the terminal server receives the meter cancellation request information table and inquires a user/meter file table, the user interface device receives the information table which waits to be confirmed and sends the confirmed information table to the terminal server after the information table is confirmed by the user, and the terminal server receives the confirmed information table to generate cancellation request records, store the cancellation request records in a remote storage module and feed a series of DM_TOKEN information tables back to the user. The user interface device types the DM_TOKEN information tables into a meter, the meter reads the DM_TOKEN information tables to feed back RC_TOKEN information tables, the user interface device reads the RC_TOKEN information tables fed back by the meter, controls tripping operation of a meter relay, and sends MC_TOKEN information tables to the terminal server, and the terminal server types in the MC_TOKEN information tables and confirms whether user balance exists.