Abstract: This article first discusses the concept and design principle of interaction,and analyses the problems in interaction design in instructional system of multimedia networks in China at present,and then introduces the characteristics and prototype of the interaction design of one instructional system of multimedia networks through the two following respects:"man-machine interaction" and "human interaction".

Key words: instructionalsystemofmultimedianetworks, interactiondesign, man-machineinteraction, humaninteraction