Aaron
Aaron
Thanks for your tips @erikwijmans
I solved it. In order to help people who meet the same problems like me and to solve as soon as possible, I wrote down my own solutions truthfully: 1st....
Try this : cd source devel/setup.bash When you meet problem like follow: 
yes, i did test it.
I also try to test it and I found there some files didn't upload, for example robot_controllers and cafe_table and so on.