Insects, as the most speciesrich taxon in the world provide essential ecological services, such as pollination, pest control, and decomposition. These ecological services are vital to the functioning of ecosystem processes and provide many benefits for humans. The services insects provide for humans are many and varied and the economic value of these services is incalculable. This paper discusses the concept and categories of insect ecological services from the perspective of their contribution to sustaining ecosystems and human societies, and their economic value. Suggestions for future research are provide