A transformer economy service life predication device is sequentially connected by an input parameter receiving and delivering module (1), a process calculation module (2) and a data fitting contrastive analysis module (6) and a constant management module (3), a constant library (4), a constant interaction module (5) and a process calculation module (2). According to the transformer economy service life predication device, the economy service life of a transformer can be accurately calculated, an application system for transformer economy service life evaluation can be rapidly formed due to combination of a calculation model, the evaluation principle and the computer technology, and a time reference point is provided for transformer maintenance and replacement.