Abstract: To solve the economic dispatching problem of household photovoltaic（PV）system caused by not fully utilizing the demand response of loads,a synergetic economic dispatching strategy that takes into account the demand response of load is proposed,which achieves the synergetic scheduling of source and load. Firstly,the demand response model of the load is established to handle the household load. Secondly,considering the uncertainty of PV output,the optimal scheduling model of grid-connected household PV system is constructed,which takes into account the user’s power sold income,power purchased cost,government subsidy,operation and maintenance cost and the construction cost of PV system. Then,this model is solved by using dynamic grid-connected transmission power as optimization variable,combining with Latin hypercube sampling and scene reduction（LHSSR）,improved particle swarm optimization algorithm. Finally,the simulation results show the correctness of the proposed model and method.