The experiment was conducted to develop the techniques of mass rearing of green lacewing for the control of silverleaf whitefly and cotton aphid. Several diets, shelter materials and rearing density were tested. The results showed that green lacewing grew faster when rearing with rice moth egg and 98% of eggs could develop into adult, when rearing capsulated artificial diet, 96% of eggs could develop into adult. Using corrugated strip paper as shelter could prevent from larval cannibalism, and 80% of larvae could develop into adult. Rearing 300 green lacewing larvae in 0.02 m^3 plastic boxes, 91% of larvae could develop into adult. The result of green house experiment for sweet pepper pest control showed that releasing 3 second instars larvae or inoculating 10 eggs per plant every 10 days could get effective control against silverleaf whitefly and cotton aphid.