The invention relates to a multifunctional device used for plating layer research, belonging to the technical field of material annealing. An infrared radiation furnace (2) which can be used in normal pressure and vacuum is arranged below a driving system (1); an electromagnetic induction heating furnace (3) is arranged below the infrared radiation furnace (2); a set of high temperature resistanthigh vacuum isolation room (4) is arranged below the electromagnetic induction heating furnace (3); an air knife (5) is arranged below the high temperature resistant high vacuum isolation room (4); asample clamping mechanism (6) is arranged below the air knife; and a hot-dipping metallic plating melting furnace (7) and a corresponding hydraulic transmission and sealing system (8) are arranged below the sample clamping mechanism (6). A continuous annealing furnace heated by low-inertia infrared radiation can realize a continuous annealing curve simulating industrial production, reduce the thermal inertia of the sample, control the temperature precision of the sample within 1 DEG C, and control a soaking zone of the sample within 100*150mm; meanwhile the test process is clean and does not have any pollution of noise, light and electricity.