Many thanks to Philippe for his quick responses and hospitality. I stayed with my mum, husband and baby boy for my business trip. It was really comfortable, the flat is enoug big and well equipped. there are towels, extra bedclothes, soap, cleanser, shampoo, dishwashing and washing machines and their detergent, television, wifi, books, films, etc. Philippe provided us baby bed and feeding chair. There is also full kitchenware, and very close supermarket so we can easily cooked. The flat is not very close to the city center but it doesn't matter. My meetings were in the airport so I went by bus(number 10) and my family visit city center and some other places and they went by bus too(number 6, 10, 19) the bus station is very close and public transport is so good but ticket is not free (it is just free once for only airport-flat direction), you have to pay for it. we paid 3 chf each one-hour ticket.
It was a very comfortable and good stay, thanks again for everything, highly recommended!