The present invention relates to a control method of a professional technician intermediary system using on-line according to the present invention, and its object is to effectively control the operation of a " professional technician intermediary system using online " The specialist can select new installation or repair according to his / her condition, so that he / she can maintain the relatively stable margin and maintain the stable income. It controls the operation of the professional technician mediation system. In the ''Application Store'', it downloads the special app for professional technician to the professional technician terminal, And send it to the main server to apply for registration as a professional engineer. A professional technician registration step of verifying the professional technician registration application field and the corresponding certificate uploaded to the in-house and registering it as a professional technician; A member customer registration step of downloading a dedicated application for a customer to a customer terminal in an ''application store'', creating a customer registration field, uploading the customer registration field to a main server, and registering as a member customer; A professional technician application step in which a customer executes a dedicated application for a customer on a customer terminal and then applies for a necessary professional technician according to a procedure; A specialist who transmits the new application information received when the expert technician application step is completed to the already registered professional technician terminals and determines the ranking of the bidding information received from the professional technicians for the new application information, A descriptor intermediation step; A repair and execution completion registration step of performing repair and repair of the target product when the expert engineer intermediation step is completed and performing repair and completion registration when the repair and repair is completed; A customer performance registration step of registering the application information and the bid information on the field of the customer when the expert engineer intermediation step is completed; And a professional technician performance registration step of registering the bidding information on the professional technician field when the professional technician mediation step is completed.
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