One Stop Service Window is the counterpart of the Investment and General Affairs Division - Industrial Development and Investment Promotion Committee. When investment case is received at Investment and General Affairs Division, the applicant or service personnel should assist the applicant to fill in Investment Project Application Form and classified by the service personnel, before hand in as qualified major investment project to the executive secretary. On the other hand, the Industrial Development and Investment Promotion Committee will contact business owner on the status of the application within four days.

Current qualification for major investment project is: Total investment amount is over NTD$50,000,000 (exclude land purchasing) or increase employed population over 50 people or after interviewed by Industrial Development and Investment Promotion Committee, the project is considered to have potential in coordinating with county government policy. A major investment project can be established once it meets one of the above criteria.