Thank you for your response, it is very useful to find other way around.
Seems like there is no vanilla feature to support my need.
Tried few commands from the wiki page, although I believe they suppose to do something else, but as they are relevent to "rotation' I still tried,
but no luck.
/we impr [0, 90, 180 or 270]
When importing block data using /we imp the imported block data will first be rotated by given angle.
/we impflip
When importing block data using /we imp the imported block data will first be vertically flipped
Those mods are very good, thats a plenty of relieve for me. Thank you