Xiaobai just started his camera and went out to travel to buy a camera case. Is it practical or camera bag?

It depends on the specific situation. Generally speaking, if you travel lightly, the camera case is really useful, because you don't need to bring too much luggage. The camera can be put in the camera case or in the suitcase. But if you travel specifically for photography, you definitely need to bring a lot of equipment and corresponding accessories. In addition to the camera, there are usually many lenses and even spare machines, various filters, lights and shelves, so even if you put the camera in the camera box, you still need a professional camera bag. Also, when your camera itself is not portable, you can only choose the camera bag.