The invention provides a substrate heating device and a soldering device. The substrate heating device can be used for a pre-heating device and a soldering device comprising the pre-heating device. The pre-heating device can be used to inhibit the power consumption, and can be used to execute the setting of the heating motion used for increasing the substrate temperature reliably and confirm the setting. The pre-heating device comprises a connector used for the connection with a target temperature detection sensor, and the connector is used to acquire the temperature of the non-detection surface of the back surface side of the detection surface detected by the temperature sensor of the substrate. In the pre-heating device, the substrate of the target temperature detection sensor used for acquiring the target temperature on the non-detection surface of the back surface side of the detection surface detected by the temperature sensor, and the target temperature detection sensor is connected with the connector. In the pre-heating device, the substrate can be pre-heated, when the target temperature detection sensor detects that the temperature of the substrate reaches the target substrate temperature, the temperature of the substrate detected by the temperature sensor can be used to set the target temperature.