Image forming method and image forming system

An image forming method using an electrophotographic photoreceptor and a toner for developing an electrostatic charge image, and having at least a charging step, an exposure step, a developing step, a transfer step and a cleaning step, wherein the charging step is a step using a contact charging device;

• in an outermost layer of the electrophotographic photoreceptor, a universal hardness value (HU) of the photoreceptor is 170 N/mm2 or more, and an elastic deformation ratio of the photoreceptor is 40% or more when a Vickers indenter is used in an environment of 25° C. and a relative humidity of 50% and pushed by a maximum load of 2 mN;
• and the toner for developing an electrostatic charge image contains toner base particles of a core-shell structure having a shell layer of 10% by mass or less with respect to a mass of the toner base particle on an outside of a resin constituting a core particle, and a solubility parameter value (SPs) of a resin constituting the shell layer is 10.75 or less.