Any social group, include government, is organized on specific structure and utilized for specific purpose. According to the different formation of constitutions and functions, there're two different types of social-public organizations, Single-Head organization for the monopoly, collegial organization for the decision of equal members. The thesis is urged to explore the basic foundation why and how a commission is organized, and to compare the difference among different types of commissions. As the approach of structure-functional theory, this thesis found there're four types of commissions in Kaoshiung Municipal Government. The first is "coordinative", for coordinate the different duties in government, the second is "consultative", for gathering the professional opinions from the outside. The third is " independent judge", for meeting to judge affairs by exist standards, and the last "regulation", for regulate public affairs by independent staffs. These four types are different commissions exist in Kaoshiung Municipal Government, but some are contradict to the findings on the structure-functional assumes which this thesis conclude.