The embodiment of the invention discloses a method and system for collaborative smelting and recycling valuable metal from a waste circuit board, scrap copper and copper-containing waste residue. Themethod comprises the steps that the waste circuit board, the scrap copper and the copper-containing waste residue are mixed and are subject to high-temperature smelting to obtain a metal alloy and slag; an anode plate is made of a metal alloy, and through electrolysis, a cathode copper product is obtained; copper anode mud and slag are combined, and through sulfuric acid leaching, leaching liquidis obtained; the leaching liquid is subject to metal replacement, nickel tin powder is separated out, and through alloying smelting, and a nickel and tin alloy product is obtained; filter liquid replacement is carried out, through alkali deposition, ferric hydroxide is separated out, and through burning, a ferric oxide product is obtained; liquid obtained after sedimentation is subject to evaporative crystallization, and a heptahydrate product is obtained. According to the method, the fire method and wet method combined collaborative smelting manner is adopted, the treatment problem of the waste circuit board, the scrap copper and the copper-containing waste residue is solved, the waste source is wide, the cost is low, the obtained product is good in quality, the recycling rate is high, the environment friendly aim reaches the standard, no secondary pollution exists, and a certain economic benefit and the industrial significance are achieved.