The Common Version Electronic Map（CVEM）is first built officially in Taiwan. The CVEM contains plentiful information in detail to meet needs of people’s livelihood and to serve as infrastructure for governmental decision making as well. The CVEM portal site built by National Land Surveying and Mapping Center provides online map query services. Over 100,000 people have visited the CVEM portal site. The website address is https://www.nlsc.gov.tw/En/MakePage/524?level=524. Everyone is welcome to visit.