The invention discloses a user side load control method and system. The method comprises the steps that protocol matching is carried out on different load devices; control parameter information and power grid operation information are obtained, wherein the control parameter information includes parameter information set by a user; control instructions, containing a first preset control mode, input by the user are received; a first preset control instruction set is generated according to the first preset control mode, the control parameter information and the power grid operation information; the load devices are controlled to execute corresponding instructions according to the first preset control instruction set. By the adoption of the user side load method and system, the problem that in the prior art, a user side load control system generally can only receive control of an upper-layer master station or system in a passive mode can be avoided, and the user can have intelligent control over the user side load control system according to actual power demands.