I am looking for shuttle from Guangzhou baiyun airport to shenglong hotel panyu district at late night 02.00AM

At that time, only few shuttle bus is in operation and neither of them will reach your hotel.
At that time, you can take the airport express line 1 to reach its terminal at Civil Aviation Ticket Office and then change to take a taxi to reach your hotel.
Although the Civil Aviation Ticket Office is still far away from your hotel, there is no other method better than this.