The DOIS's current mission is to promote foreign investment in Taiwan, assist Taiwan companies investing abroad and recruit science and technology personnel. In order to assist foreign companies and Taiwan businesses overseas, the DOIS serves as a liaison between businesses and the Taiwan government, and maintains "service contact windows" to facilitate communication between foreign companies and Taiwan businesses, and government agencies and consulate offices abroad. The DOIS's work is divided into eight general categories:
In the past DOIS's mission was limited to the promoting investment in Taiwan by overseas Chinese and foreigners as its primary mission. Beginning in the mid-1980s, however, major changes started to take place in the domestic and international economic environment, and the DOIS adjusted to these changes by expanding its services to include the provision of consulting and assistance for domestic companies investing abroad and assistance for domestic investors, and to assist ROC nationals in dealing with governments and private enterprises in other countries.
To strengthen its services for foreign and Taiwanese companies, to provide information on investment in Taiwan, and to provide assistance with upgrading of industrial technology, the DOIS has set up the following websites: