The invention discloses an optimization method for a household micro-grid operation. The method comprises the following steps: (1) classifying household electrical appliances; (2) determining a system target function, a decision variable and relevant constraint conditions to form an original global optimization problem; (3) determining a lyapunov function and a lyapunov drift aiming at a controllable load queue; (4) converting the original global optimization problem into a sub-problem at each moment according to a lyapunov optimization method; (5) obtaining related data of photovoltaic output, electricity price and controllable loads at the current moment; (6) carrying out a pre-distribution on the photovoltaic output in various loads according to a certain principle; (7) solving the sub-problem at the current moment to obtain the decision variable at the current moment; and (8) updating the time into the next moment, and returning to the step (6) until the whole optimization time interval is ended. According to the optimization method for the household micro-grid operation disclosed by the invention, a regulation and control decision on the micro-grid at the current moment can be obtained only by obtaining various states in a micro-grid system at the current moment.