Gravitational lensings provide unique opportunities to study distant galaxies. Despite their usefulness, only a dozens of gravitational arcs have been reported up-to-date, hampered by the low resolution imaging from ground-based surveys. We propose a novel method to identify Einstein rings/arcs in the IFU surveys via image subtraction and computer vision techniques. We use the recent discovered strong lens system in the MaNGA survey as a proof-of-concept; in addition to MaNGA, our approach is applicable to other IFU surveys, such as SAMI, CALIFA, Hector, DESI, and 4MOST.