The present invention relates to a heat storage type heating device for collecting various data such as external temperature change, thereby carrying out more effective heat storage and heating operation, and a control method thereof. The heat storage type heating device with the external data collecting function according to the present invention comprises: an outdoor temperature detecting section for detecting outdoor temperature; a storage heater for retaining heat generated with late-night electricity; a section for detecting temperature of retained heat for detecting the temperature of the storage heater; a server for calculating a heat accumulation amount according to the outdoor temperature detected by the outdoor temperature detecting section so as to control the operation state of the heat storage heater, and supplying the stored heat to a plurality of fan heaters so as to control the heating of rooms; the plurality of fan heaters for heating rooms; and a data processing/collecting unit for transmitting data of a server to the fan heaters, monitoring current states of the fan heaters, and collecting data of the fan heaters to transmit the same to the server. Therefore, more effective heat storage and heating operation are carried out, preventing unnecessary energy waste.