A method for bonding a film (200) to a lens (300) and a device (100) for bonding a film to a lens (300) are provided. A first jig (10) and a second jig (20) are controlled to move relative to each other, to gradually bond a middle position to an edge position on the lens (300) to the film (200), so that bubbles between the film (200) and the lens (300) can be reduced, and a good film bonding effect can be achieved. In addition, it is unnecessary to process the film (200) in advance, and it is also unnecessary to obtain the lens (300) through injection molding after the film (200) is formed, so that optical performance or mechanical performance of the bonded film (200) can be ensured. A required optical element can be obtained by using the simple method for bonding the film (200), and optical performance and mechanical performance of the optical element obtained by bonding the film (200) to the lens (300) can be ensured.