- Minister without Portfolio, Executive Yuan (2020-2022)
- Board Director, National Applied Research Laboratories (NARLabs) (2020-2022)
- President, Taiwan Smart Living Space Association (2019-2020)
- Chairman, Institute for Information Industry (2016-2017)
- Executive Secretary, Office of Science and Technology, and Member, Board of Science and Technology, Executive Yuan (2016-2017)
- Dean and Distinguished Professor, College of Science, National Chengchi University (2012-2015)
- Associate Professor/Professor/Distinguished Professor, Department of Computer Science and Information Engineering, NCKU (1988-present)
- Director, Engineering and Technology Promotion Center, National Science Council (NSC) (2010-2011)
- Deputy Executive Secretary, Science and Technology Advisory Group, Executive Yuan (2006-2008)
- Board Director, Taiwan Network Information Center (TWNIC) (2005-2006)
- Director, Computer Center, Ministry of Education (2004-2006)
- Director, Computer Science and Information Engineering Program II, NSC (2002-2005)
- Director, Center for Research of E-life Digital Technology (CREDIT), NCKU (2000-2005, 2008-2012, 2015-2016, 2017-2020)
- President, Taiwanese Association for Artificial Intelligence (1999-2001)
