Construction project organization is usually regarded as 'organized' organization during the research at present and this recognition is rigid because the people's initiative is ignored. The form of changes in construction project organization in its life cycle is the result of the process that construction project organization is adapting to the environment and requirement of mission constantly, and the result is the exterior manifestation of self-organization about the construction project organization also. The construction project organization includes some sub-systems from the system theory. Through Boolean algebra calculation, there have been distinct characters of 'self-organization' in construction project organization by analysing the result, and the construction project organization is self-organization system which needs to adjust manually. The conclusions list above provides a new way of thinking and direction for the design of construction project organization.