The present invention relates to a control method of a professional technician intermediary system using on-line, and an object of the present invention is to provide a control method of a professional technician intermediary system, The present invention is to provide a control method of a professional technician mediation system using on-line that can securely acquire a large number of new installation or repair and maintenance matters at the same time, thereby stably increasing imports. A step of recruiting a professional engineer to recruit a specialized engineer by conducting an advertisement; A step of registering a professional engineer to receive an expert engineer registration application via off-line; A professional technician registration step of classifying and registering professional technicians in each field into a corresponding technical field; A professional technician requesting a customer to request a necessary expert technician through a wireless or wired customer terminal; A professional technician mediation step for mediating a professional technician who meets the requirements when a professional technician is requested from the customer; A customer performance registration step of registering brokerage customer performance information on a customer field of the customer when the expert engineer brokering step is completed; And a professional technician performance registration step of registering the performance information on the professional technician field when the professional technician mediation step is completed.
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