PURPOSE: To provide method and device for generation of cold heat which can take out easily cold heat in a freezing temperature range.

CONSTITUTION: A pair of containers 1 and 3 formed of a low pressure side container which is charged with metal hydride of a low hydrogen balance pressure and a high pressure side container which is charged with metal hydride of a high hydrogen balance pressure and another pair of containers 2 and 4 are communicated mutually through hydrogen conduits 8a and 8b, so that a hydrogen stream may be switched to change its flowing direction alternately by a compressor 5 between the pairs of containers 1 and 3, and 2 and 4. In accordance with this switching, a heat exchanger of the low pressure side container which is on a hydrogen releasing side and a heat exchanger of the high pressure side container which is on a hydrogen absorbing side are connected, a heat exchanger of the low pressure side container on a hydrogen absorbing side and a heat exchanger of a heat releasing part are connected, and further a heat exchanger of the high pressure side container on a hydrogen releasing side and a heat exchanger of a cooling load 13 are connected.