The hotel called a car for the guests. If there is a traffic accident on the way, will the hotel bear legal responsibility?

It depends. If it is the hotel's responsibility to call a car (such as paying the hotel, the hotel settling accounts with the car, or the car itself is the hotel's car), the hotel should be responsible (contractual relationship).

Conversely, the hotel only helps customers take taxis (this is a mandatory relationship), and taxis should be responsible for accidents.