Abstract: The paper comparatively analyses the planting benefit of greenhouse and open field vegetables from economic and ecological benefit sides and explains the reason of their difference. The research result shows that from 1998 to 2009, greenhouse vegetables production of Shandong Province has significant positive economic benefit advantage in contrast with open field vegetables of Shandong Province and national average greenhouse vegetables in all times, showing an upward tendency as a whole. Greenhouse vegetables production of Shandong Province has more poor ecological benefit than open field vegetables of Shandong Province and national average greenhouse vegetables from 1998 to 2009.