When a communication message notification initiated by a current communication window is received, a correlation relationship between a party participating in a communication and K communication subjects that belong to a same user system which acts as another party participating in the communication is obtained respectively. The K communication subjects that belong to the same user system have a common principal account and each communication subject has a corresponding child account. Alternatively, the K communication subjects use a same account and logs in different communication tools in the same system. K≥1. According to the correlation relationship, historical communication contents between the party participating in the communication and the K communication subjects are obtained respectively. The historical communication contents are combined. The combined communication contents are saved and displayed. The present techniques avoid the tedious and overdue problem of manually combining the communication contents.