Application of Construction Project- Organization Structure in Project Management (1) Characteristics and Application of Functional Organizational Structure (1) It is a traditional organizational structure. (2) Each functional department may issue work instructions to its direct and indirect subordinate departments, and each working department will have multiple sources of contradictory instructions. (3) Many construction projects also use this traditional organizational structure mode and contradictory working instruction relationship, which seriously affects the operation of project management mechanism and the realization of project objectives. (2) Characteristics and Application of Linear Organizational Structure (1) Linear organization comes from a very rigorous military organization system. (2) Each Department has only one direct superior department and only one instruction source. (3) Internationally, linear organizational structure is a common mode of construction project management system. (4) In a very large organizational system, too long command paths may cause operational difficulties. (3) Characteristic and Application of Matrix Organization Structure (1) Matrix organizational structure is a new organizational structure model. (2) There are two different types of work departments, vertical and horizontal, under the Supreme Commander (department) of matrix organizational structure. (3) Matrix organizational structure is suitable for large organizational systems. (4) The instruction source comes from vertical and horizontal departments, and there are two instruction sources. (5) When the directives of the vertical and horizontal departments are contradictory, the top commander of the organization system coordinates or makes decisions. (6) In order to avoid the contradiction of instructions, it is possible to give priority to vertical instructions or horizontal instructions.