HYBRID SYSTEM

[Problem] To provide a hybrid system which can detect and store a temperature of a battery that supplies electric power to a motor at the time of storage, while power consumption of the battery that supplies the electric power to an ECU is suppressed. [Solution] A hybrid system is a hybrid system mounted on an industrial machine and has a motor a battery that supplies electric power to the motor and a storage portion and also includes a control portion that executes such control that detects a temperature of the battery , when an ignition switch of the industrial machine is turned on, and stores the temperature at the detection as a temperature of the industrial machine at the time of storage in the storage portion .