An instant message communication device that includes a database, a data transmission module, a processing module, and a memory is provided. When commands stored in the memory are performed by the processing module, the following operations are performed. User information that includes a user account is received through the data transmission module. An instant message software robot is driven to add the user account into a robot contact list of a robot account. An account pair relation corresponding to the user account and the robot account is stored in the database. A request is transmitted to a user device having the user account through the data transmission module. The robot account is determined being added to a user contact list. The instant message software robot is controlled to perform an instant message communication with the user device through the data transmission device according to the account pair relation.