The invention provides an intelligent electricity consumption service system based on the UC technology. The intelligent electricity consumption service system comprises a backstage server, a secure access platform, a cell intelligent electricity consumption service terminal and an intelligent mobile terminal. The cell intelligent electricity consumption service terminal is fixedly arranged in a cell, is accessed to the secure access platform through a 2G network, a 3G network or an Ethernet network to communicate with the backstage server and receives a query or operation command issued during operation by a user. The intelligent mobile terminal communicates with the backstage server through the 2G network, the 3G network or the Ethernet network after being equipped with a client. The backstage server sends a power grid promotion message or household electricity consumption information to the intelligent mobile terminal through the secure access platform, and the user receives the power grid promotion message or the household electricity consumption information through the intelligent mobile terminal. According to the intelligent electricity consumption service system provided by the invention, users can have the new experiences of active display of historical electricity consumption data, active reminding for insufficient electricity balance, power purchase business handling, timely fault reporting and the like through the mobile terminal.