Abstract: The nature of high-tech industry is high risk, high return and high growth. Investors need to distinguish its special investment value and growing potential. Based on models to test the relationship between cumulated abnormal return and five independent variables including the structure of ownership, basic situation, R&D intensity, future growth opportunity and current earning index, this paper indicates that the variables representing future growth opportunity play important roles in deciding investment value. Meanwhile,the correlation between CAR and current stock ratio, R&D intensity is evident. The company with high growth flow and low PIE have been considered to be investable most strongly.