Informal employment （IE） , as a way of solving urban unemployment problem and alleviating the social conflict in urban areas, has been of public concern worldwide. However, in practicing IE, people tend to define the concept of IE in a vague and broad way. The major causes for this, the author believes, are that the development of ICT leads to the obscure distinction between formal and informal departments and that the consideration of convenience in operating and in calculating leads to various criteria of informal employment. Besides, the close relationship between informal employment, informal economy and household economy makes the concept complex. A theoretical thinking on IE and definition of the concept will contribute to the development of IE.
Journal of Ningbo University(Liberal Arts Edition)