A communication system includes a first communication terminal configured to comply with a plurality of communication methods, and a second communication terminal that complies with any one of the communication methods, wherein the first communication terminal includes a network creating unit configured to transmit a notification signal including information about a network to create a network that complies with any one of the communication methods, a checking unit configured to check history information about a communication between the first communication terminal and the second communication terminal according to a notification signal including information about a network different from the network that has been created by the network creating unit, while the network creating unit has created the network, and a communication control unit configured to cause the first communication terminal to join the network created by the second communication terminal based on the history information.