A system for manufacturing a composite board, the system comprising: a hot-press device for hot-pressing a first composite board in which a coverlay is pre-bonded onto a printed circuit board to discharge a second composite board; and a transfer device for controlling the supply amount of the first composite board while transferring the first composite board into the hot-press device, wherein the transfer device comprises: a transfer body part, a first transfer guide roller part installed at one end of the transfer body part to guide the supplied first composite board in which the coverlay is pre-bonded onto the printed circuit board to the opposite end of the transfer body part, a rail part installed on one surface of the transfer body part in the longitudinal direction of the transfer body part, a second transfer guide roller part installed at the opposite end of the transfer body part to be further spaced apart from the transfer body part than the first guide roller part and guiding the first composite board supplied from the first transfer guide roller part to the hot-press device, a transfer clamp part moving along the rail part and positioned between the first transfer guide roller part and the second transfer guide roller part to clamp and transfer the first composite board supplied from the first transfer guide roller part to the second transfer guide roller part, and a clamp driving part for driving the transfer clamp part. a hot-press device for hot-pressing a first composite board in which a coverlay is pre-bonded onto a printed circuit board to discharge a second composite board; and a transfer device for controlling the supply amount of the first composite board while transferring the first composite board into the hot-press device, wherein the transfer device comprises: a transfer body part, a first transfer guide roller part installed at one end of the transfer body part to guide the supplied first composite board in which the coverlay is pre-bonded onto the printed circuit board to the opposite end of the transfer body part, a rail part installed on one surface of the transfer body part in the longitudinal direction of the transfer body part, a second transfer guide roller part installed at the opposite end of the transfer body part to be further spaced apart from the transfer body part than the first guide roller part and guiding the first composite board supplied from the first transfer guide roller part to the hot-press device, a transfer clamp part moving along the rail part and positioned between the first transfer guide roller part and the second transfer guide roller part to clamp and transfer the first composite board supplied from the first transfer guide roller part to the second transfer guide roller part, and a clamp driving part for driving the transfer clamp part. a transfer body part, a first transfer guide roller part installed at one end of the transfer body part to guide the supplied first composite board in which the coverlay is pre-bonded onto the printed circuit board to the opposite end of the transfer body part, a rail part installed on one surface of the transfer body part in the longitudinal direction of the transfer body part, a second transfer guide roller part installed at the opposite end of the transfer body part to be further spaced apart from the transfer body part than the first guide roller part and guiding the first composite board supplied from the first transfer guide roller part to the hot-press device, a transfer clamp part moving along the rail part and positioned between the first transfer guide roller part and the second transfer guide roller part to clamp and transfer the first composite board supplied from the first transfer guide roller part to the second transfer guide roller part, and a clamp driving part for driving the transfer clamp part.