The present invention relates to a system for predicting battery usage habits and battery discharge tendencies. The system includes a battery sensor that senses a state of charge (SOC) of a battery and a controller hat calculates battery power generation amount during driving time of a vehicle and battery consumption during parking time of the vehicle based on information sensed by the battery sensor. A storage unit for stores the battery power generation amount, the battery consumption, time at which the vehicle is tuned on/off, and time at which the controller enters a sleep/wake-up state.