A wireless communication method includes receiving from an other wireless communication device, by using a non-contact communication method, specification data that indicates a communication function of the other wireless communication device. The wireless communication method also includes converting, if the specification data does not correspond to a wireless communication whose communication speed is faster than a communication speed of the non-contact communication method, a data format of transmission data that is transmitted to the other wireless communication device to a data format that reduces a data volume of the transmission data. Additionally, the wireless communication method includes transmitting, by the non-contact communication method, to the other wireless communication device, the transmission data whose data format was converted to reduce the data volume of the transmission data.