The best way is taking Shenzhen Airport Shuttle Bus to Shenzhen Railway Station and take train to Guangzhou.

how much is the cost to take shenzehn airport shuttle bus to shenzehn railway station and which railway station? how much is the cost to take train to guangzhou?y dont take the bus directly to guangzhou??which one is cheaper?

There is no direct bus from Shenzhen Airport to Guangzhou, the two options are by train or by bus. For the first one, you need to take airport shuttle to Shenzhen Raiwlay Station (main railway station in Shenzhen, beside Luohu Boarder), and then take train to Guangzhou. Shuttle Bus ticket is CNY20 per each and the train ticket is CNY46-80.

For the latter route, you can take bus to Futian Bus Station and take long distance bus to guangzhou, Shuttle Bus ticket price is CNY15-20, and then coach ticket price is around CNY60.