How much i cost from wuhan airport to jiangxi university for taxi and bus?

Do you refer to Nanchang University? Well, the distance is about 242 miles (390km). No direct bus is available. I am afraid that you cannot find a taxi for such a long distance.

You may take shuttle bus to WH Railway Station. Then, take a bullet train to Nanchang West Railway Station (about 3 hours). The second class seat costs CNY 100.5, and the first class seat costs CNY 121. Upon arrival, take a taxi to it for about CNY 15.