Greetings Haisheng,
It might be the version you have. The earliest version I had of hybris Marketing was 1505. So I don't have an idea about the release 1502.
As of 1511 release, there's a customizing field named as "Process Type" in campaign category customizing. It holds the values "Default" , "Facebook" and "Trigger-based" respectively.
Edit: SAP hybris Marketing Application Help documentations are based on the latest release of the product. So some customizings may be missing or entirely changed