i am in hk shun tak centre and want to go to guangzhou international airport .is there any direct

I'm afraid there is no direct public transportation for the trip. Well then, I suggest you go to HK-Macau Ferry Terminal at Sheung Wan from where you are to find the coaches operated by Trans-Island Limousine Service to GZ and you can get off at Dongfang Hotel. Nearby you can find Baiyun Airport shuttle bus line 5. It can take you to the airport directly then!

Or you can walk from where u are to Central MTR Station to take HK MTR Tsuen Wan line to Tsim Sha Tsui and then walk to Tsim Sha Tsui East to take West Rail line to Hung Hom. At Hung Hom Railway Station, you can take a train to GZ East Train Station. Then walk to CITIC Plaza to take shuttle bus line 7 to the airport!