Perovskite materials are considered the mainstay of PV manufacturing asoutstandingto notable optoelectronic properties. In this work the act of Pb-free FASnI3 based PSC, TiO2 as ETL, and Cu2O as HTL and Ag,Au, Pt,are the different metal contact is simulated using SCAPS software. Here we focused on the impactparameters of device such as the thickness of the Ab-Layer, doping level ofperovskite layer and different working temperature. Additionally, we investigated the effect of different metal contact and their work function. The simulated results show that a perovskite layer thickness of 350nm for good perovskite solar cell. For optimizing parameters, efficiency 18.10%, FF 78.14, Jsc 29.61, and Voc 0.7821 have been achieved for Cu2O and TiO2 respectively. The thermal study shows that device configurations for this present work at 300k it is stable for this entire work.