If Mercury and the Earth switched places, would there be life on Mercury?

No! Mercury is the second asteroid in the solar system. Its atmosphere is very thin and the temperature is so high (the maximum surface temperature is 427°C). The temperature difference is the largest in the entire solar system, and the range of temperature changes is The temperature is -173°C to 427°C, there is no water, the magnetic field strength is about 1% of that of the Earth, and it cannot withstand strong space radiation. All these conditions are not suitable for biological survival.