To provide a device and a method for development, and an image recording device that can stabilize the picture quality of an output body by suppressing a drop in temperature of a processing liquid due to supply of a replenisher during development of a photosensitive material after exposure and recording.

The method for development in which the photosensitive material is dipped in a plurality of processing liquid tanks wherein processing liquids are reserved in order while conveyed to perform development processing includes a step S12 of monitoring processing liquid temperatures of the processing liquid tanks while supplying replenishers reserved in replenisher tanks to the processing liquid tanks, a step S15 of interrupting the supply of a replenisher when a processing liquid temperature drops below a specified temperature, and a step of restarting supplying the replenisher after the processing liquid temperature recovers to the specified temperature.