Pls guide shanghai airport to Linan's city by bus route ?

If from Pudong Airport, you can take shuttle bus line 7 to SH South Railway Station. Then walk to the neaby South Long-distance Bus Station to take a bus to Lin'an.

If from Hongqiao Airport, I would recommend you walk to Hongqiao Railway Station to take a high-speed train to Hangzhou first. If you will arrive in Hangzhou Railway Station, take local bus no. 49 or take a taxi to the West Bus Station to transfer to another bus to Lin'an.