A data processor includes a communication unit, a customized data acquiring unit, a storing unit, a status data acquiring unit, and a display unit. The communication unit performs data communication with an electrical equipment. The customized data acquiring unit acquires customized data. The storing unit stores fixed data and the customized data acquired by the customized data acquiring unit. The customized data is correlated with the fixed data. The status data acquiring unit acquires status data from the electrical equipment via the communication unit. The display unit displays the fixed data and the customized data. The fixed data and the customized data are in association with the status data acquired by the status data acquiring unit.