Abstract: The purpose,principle and method of introducing novel species to an agroecosystem are discussed from the viewpoints of agroecology and systematics.The main purposes of introducingnovel species should be:expanding production,increasing profits,eliminating or controllingpollution and increasing the stability of system.The principles which should be observedare:principles of system organization,principles of ecological niche and principles of dynamic development.Finally,methods for feasibility study in introducing novel species andsteps for noevl species introduction are commented.

Key words: Forest resources, Landscape index, RS, GIS