To study the custoos formalities concerning the pronotion of domestic industry with the objective to study rubs and regulations which encourage the industrial developraent so as to bring benefits to all sectors concerned. The exercise of customs regulations as a mechanism to boost the local producers is also under studiedo Suggestions are also given to industries which are considered as having priority.naaelyt the manufacture of goods by using local raw materials and the processing of agricultural products. The method used to carry on this study is to review the available publications from government agencies as veil as to interview businessman and government officials concerned. Thin study is divided into seven chapters. Chapter 1 and 2 are to study the development of customs formalities so as to emphasize how to Customs Department plays an important role to the industrial development as well as national development. Chapter 3 deals with the history of industrial development in Thailand. How the industry, is classified. The role of industry plays to the national economy. Chapter 4 is to study the industrial development. The essential factors for industrialization are also emphasized. Chapter 5 centers on the industrial promotion in order to create domestic industry. The role of Board of Investment plays to the industrial development in this country. Privileges given to local producers under the Industrial Promotion Act and related laws are discussed. Chapter 6 is to study the operation of customs regulations as a mechanism to promote local industry as well as to boost the export. Measures are taken to subside exportation such as draw back and refund. Facilities are also provided such as bonded manufacturing warehouse and Kaoshing Export Processing Zone. Chapter 7 gives conclusions. Obstacles relating to industrial development are pointed out. Solutions to the problems are recommended so as to pave the way for industrialization for the benefit of the nation's economy.