Hello @Jaeyoung-Lim !
I have taken a look at the page you mentioned. According to it I can use images of Pi 2 on 3B+. However the procedure is too lengthy. I have currently flashed raspbian stretch on my pi and have additionally installed ROS kinetic on it. Let me know if I am on the right track. Also I am using your pages on 404 warehouse. Thanks much for those tutorials , they are very helpful.