The purpose of this study is to analyze the current situation and trend over Taiwan's Specialty Chemicals of Printed Circuit Board industry. In addition, this study explores the optimal management strategy through competitive strategy theory and case study, and proposes suggestions on management stratedy to Specialty Chemicals of Printed Circuit Board industry. The key success factors were summarized from literature review and analysis of current industry status. By using these factors as variables to design the questionnaire and conducting the survey with in-depth interview, following concousions were made from the study. 1.The business advangate of Taiwan Specialty Chemicals of Printed Circuit Board industry includes the well-developed finance and stable capital support, great R&D ability, stable quality sandard, outstanding customer and after-sale service, plenty talent person for management and technology, and excellent enterprise culture. 2.Key factors affecting the competiveness among the Taiwan Specialty Chemicals of Printed Circuit Board industry are as follows. (1)Suppliers: product quality and the ability of problems solving and readily answering form suppliers. (2)Customers: identification with the brand quality and the bargaining power and purchasing amount of customers. (3)New entrants: distinctive product and technology, product differentiation and cost advantage. (4)Substitute products: function, quality, price, switching cost and R&D ability of substitute products. (5)Competitive rivalry: switching cost of customers, the integral industry growth rate and the integral actual strength of competitors. 3.The study suggests the Taiwan Specialty Chemicals of Printed Circuit Board industry to adopt the following competitive strategy. (1)Cost leadership strategy: to seek for suppliers with lower supplying cost, stable suppling and lower manpower cost. (2)Differentiation strategy: product innovation and quality. (3)Growth strategy: vertical intergration of upstream to downstream manufacturering partners and discriminiate market development.