Hi, Mrs. Judy, you have the same question as the Mr. Jone's. You can adopt the way that I told Mr. Jones. Just take the Bus E21.
Additionally, you may take the airport express and then take the free shuttle bus to the hotel. However,the cost is much higher than the Bus E21. If I were you, I would choose E21.

Thanks Ms Evelyn. By the way, I forgot to tell you we have a party of six. Is it cheaper to take public bus than taking a taxi ?

Bus is much cheaper. Hong Kong taxi has the maximum capacity of five adults, so, you should have two taxis, I am afraid. It cost two much from the airport to the city center by taxi.