I am planning to travel by taxi from Beijing Capital Airport to Dezhou? How much will it cost?

Well, I'm afraid that no taxi can take you to Dezhou because of the long distance. Thus you are advised to take shuttle bus to get to the South Railway Station first. Then take the high-speed trains to the Dezhou East Railway Station. The train takes around 1.5 hours. And the ticket fare of second class seat is CNY144.5, first class seat is CNY244.5 and business class seat is CNY454.5.