An image forming method comprising: adhering a pretreatment liquid to a surface of a recording medium bearing a coat layer thereon, wherein the recording medium includes a support, and the coat layer is located at least one surface of the support and wherein the pretreatment liquid includes at least water and at least one of: i a water soluble aliphatic organic acid, ii an organic acid ammonium salt, or iii a water soluble cationic polymer; adhering an inkjet ink including a colorant, an organic solvent, a surfactant and water to the surface of the recording medium, to which the pretreatment liquid has been adhered, to form an image of the ink; and adhering an aftertreatment liquid to the surface of the recording medium, on which the image has been formed, wherein the aftertreatment liquid includes a component capable of forming a transparent protective layer on an image-bearing surface of the recording medium, to form a protective layer at least on the ink image on the recording medium, wherein the organic solvent of the ink includes: a polyalcohol having an equilibrium moisture content of not less than 30% by weight at 23°C and 80%RH; an amide compound having the below-mentioned formula: wherein R represents an alkyl group having 4 to 6 carbon atoms; and a compound having a formula selected from the group consisting of the below-mentioned formulae to: wherein R 1 represents a hydrogen atom, or an alkyl group having 1 or 2 carbon atoms, and R 2 represents an alkyl group having 1 to 4 carbon atoms; wherein R' represents an alkyl group having 1 or 2 carbon atoms, and R 3 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cyclic alkyl group, or an aromatic group; and wherein each of R 4 and R 5 independently represents an alkyl group having 1 to 8 carbon atoms. adhering a pretreatment liquid to a surface of a recording medium bearing a coat layer thereon, wherein the recording medium includes a support, and the coat layer is located at least one surface of the support and wherein the pretreatment liquid includes at least water and at least one of: i a water soluble aliphatic organic acid, ii an organic acid ammonium salt, or iii a water soluble cationic polymer; i a water soluble aliphatic organic acid, ii an organic acid ammonium salt, or iii a water soluble cationic polymer; adhering an inkjet ink including a colorant, an organic solvent, a surfactant and water to the surface of the recording medium, to which the pretreatment liquid has been adhered, to form an image of the ink; and adhering an aftertreatment liquid to the surface of the recording medium, on which the image has been formed, wherein the aftertreatment liquid includes a component capable of forming a transparent protective layer on an image-bearing surface of the recording medium, to form a protective layer at least on the ink image on the recording medium, a polyalcohol having an equilibrium moisture content of not less than 30% by weight at 23°C and 80%RH; an amide compound having the below-mentioned formula: wherein R represents an alkyl group having 4 to 6 carbon atoms; and a compound having a formula selected from the group consisting of the below-mentioned formulae to: wherein R 1 represents a hydrogen atom, or an alkyl group having 1 or 2 carbon atoms, and R 2 represents an alkyl group having 1 to 4 carbon atoms; wherein R' represents an alkyl group having 1 or 2 carbon atoms, and R 3 represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cyclic alkyl group, or an aromatic group; and wherein each of R 4 and R 5 independently represents an alkyl group having 1 to 8 carbon atoms.