There is provided a telephone system, which can surely read a telephone number written on a sheet such as a name card and make a call to the telephone number. OCR reader 3, key input section 4 and calling control section 5 are connected to CPU 1. In telephone directory memory 7 connected to the CPU 1, telephone number data obtained based on written content data read by the OCR reader 3 can be saved as it is or in an edited state, telephone number data newly entered by the key input section 4 can be saved, and the saved data can be taken out at an optional point of time. Identification/determination section 8 connected to the CPU 1 carries out identification and determination to obtain telephone number data from the written content data read by the OCR reader 3 under predetermined conditions.