Hi, is there buses at Shantou Waisha Airport to Xiamen, take how long to arrive and how much?

No, I'm afraid that there is no direct long-distance bus between these two places. You are advised to take coach from ST Main Bus Station and arrive at Xiamen. The bus schedules are 08:00, 09:20, 11:05, 12:50, 15:10 and 19:50. The ticket fare is CNY 130 per person. Generally speaking, the trip takes around 5 hours.