Board Heterogeneity is always an important issue when we used to examine company's performance. However , sholar rarely studied the determinants of the board heterogeneity . Besides , we think that the more board heterogeneity the company have, the more different views and talent will be given in the board. We gathered all the Taiwan companies with toal assets above $15 billion NTD in 2012 to be our sources. There are six dependant variables: sex, tenure, sharholding ratio, educational region, educational level, Profesional background. And Four dimensions which are the complexity of company, the power of the manager, the scale and structure of the board, and the power of ultimate control. We use hierarchical regression to discuss and also verify our four hypothesis as follows: Hypothesis 1: Board heterogeniety and the complexity of company are positive correlated Hypothesis 2: Board heterogeniety and the power of manager are negative correlated Hypothesis 3: Board heterogeniety and the scale and structure of the board are positive correlated Hypothesis 4: Board heterogeniety and the power of ultimate control are negative correlated According to our research outcome, we found the hypothesis 1,2.3 are verified, but hypothesis 4 is partially verified because of company's alliance and merger.