In the 2000s, the digitalization of the economy and industry was carried out rapidly due to the development of information and communication technologies such as the Internet and the popularization of smartphones.[5] As a result, on-demand platform based on digital technology has created jobs and employment forms that are differentiated from existing offline transactions based on accessibility, convenience and price competitiveness, the "gig economy" has become a focus.[5] In general, "work" is described as a full-time worker with a set working hours, including benefits.[6] But the definition of work began to change with changing economic conditions and continued technological advances, and the change in the economy created a new labor force characterized by independent and contractual labor, such as well.[6]