With the rapid development of new technologies including ICT and AI and the data economy, employment system and work style have undergone major changes triggered by the unprecedented environmental change of the COVID-19 crisis. In particular, telework, independent self-employment, and multiple job holders are attracting attention as new work styles made possible by new technologies. At the same time, these work styles are causing various labor issues. In order to respond to such changes, we need to have a more fundamental and broader perspective on new work styles and labor markets, however, existing studies on telework, independent self-employment, and multiple job holders have been conducted independently, despite the interdependence of these work styles. This paper introduces preliminary results of a comprehensive web survey conducted by the Research Institute of Economy, Trade and Industry (RIETI) to understand the actual conditions and issues of working styles: teleworking, independent self-employment, multiple job holding, and unemployment.