A multiple-linear-programming (MLP) model is developed for the planning of rural energy system. The system, composed of energy, economy, and ecology, is divided into four connected single-linear-programming models from high to low according to economic classification, departments, trades, products, and energy supply system. Each model is optimized from high to low, and its parameters are then modified by one lower-step optimization from low to high; repetition is continued until the system reaches the final state. Rural Beijing is taken as an example. A three-step model (involving departments, trades, key products, and the energy supply system) is applied to rural energy system planning. A computer is used to obtain the results. After the analysis is completed, the economy and energy plan are delineated and some suggestions for planning are proposed.