Professor Jiunn-rong Yeh is known for his policy science approach to various law and policy issues, including constitutional change, environmental policy and regulatory processes. He was the Vice Dean of the College of Law, National Taiwan University, in charge of academic affairs and international collaboration. He has substantially involved in many constitutional, legislative and regulatory issues in Taiwan. He argued in front of the Council of Grand on the constitutional issue of the Fourth Nuclear Power Plant installation, also heading or participating in the drafting of several major legislative bills, including the Freedom of Information Act, the Administrative Procedural Act, the Superfund Law and the Greenhouse Gas Control Act. Jiunn-rong participated in the Melbourne Forum in 2019.