To provide a wet image forming method and its device capable of reusing recovered developer by adjusting the component of the recovered developer recovered from a developer carrier, without the installation of a special detecting means or a measuring means.

Image data are read, and an image part area and a non-image part area calculated by a writing control board 104 and the calculated value of image density are transmitted to a CPU board 100, and the estimated developer particle weight and the solvent amount to be consumed at the actual image formation are specified based on the calculated value. And, a developer particle replenishment control means 106 for controlling the replenishment amount of the developer particles replenished into a developer recovering tank through a developer particle replenishing tube and a solvent replenishment control means 107 for controlling the replenishment amount of the solvent replenished into the developer recovering tank through a solvent replenishment tube are controlled by the CPU board 100 based on the consumption of the developer particles and the solvent, to readjust the component of the recovered developer so that it becomes the same component as that of the starting agent.