Objective To realize the organophosphorus pesticide residue of green vegetable in Macao. Method Eight hundred and seventeen samples were collected in markets, vendors, and other vegetable selling places from 2000 to 2003, and organophosphorus pesticide residue were tested. Result The annual rates of non qualified green vegetables were 7 3%, 13 2%, 13 1% to 14 9% and steadily significantly increased from 2000 to 2003(Adjusted R 2=0 074, P =0 03). Except the year of 2002, samples collected from vendors were significantly higher than from markets( P <0 05). The main reason for the non qualified samples was the high residue of methmidophos and malathion. According to the type of green vegetable, water convolvulus was the most common non qualified samples. Almost 40% of the water convolvulus samples were classified as non qualified. Discussion Considering with the steps from farm to table, not only the proper method of using pesticides needs to be reviewed, but also the surveillance of sale market cannot be neglected by government and relevant departments.