When you arrive at the airport, please take the airport shuttle bus Line 1 and then get off at Xinhua Rd. Bus Station. It takes abouy one hour and 15RMB. At the bus station, you could catch a coach to that city in one hour. The fare is 37RMB per person.

Thank you Mr. Shan for your prompt reply.
I was wondering if you can show it on a map so that I wouldn't miss the bus station at Xinhua Rd. Also I was wondering if the English signs for bus station/roads name are usual in Wuhan/China or not.
Thank you very much.

The Bus station is in Hankou, near the crossing of Xinhua Road and Jiefang Dadao (a bit north of the crossing).

1. What options are available ;if I arrive around 7pm?
2. Do you suggest using bus? (consider this is my first trip to china)
3. How much does it cost if I take a taxi from Wuhan airport to the city?

Yes, suggest you use a bus, especailly on the way to huangshi. The last bus seems to leave nearly 8pm. if you miss the bus you can take the one to Hankou Minhang Xiaoqu which runs till 10pm. Then take a taxi to the bus station. But you still miss the last bus to Huangshi. Other option, take the airport shuttle bus to Fujiapo Bus Station in Wuchang. Then get to Wuchang Railway Station by taxi. The last train to Huangshi leaves at 22:04. There are other two leaving at 21:46 and 21:55. Take you one hour on the way.