What error are you getting?

[1]> (require :cl-ppcre)

*** - LOAD: A file with name CL-PPCRE does not exist

The following restarts are available:

ABORT :R1 Abort main loop

> Maybe i just don't know how to use library in lisp, and i'm using
> clisp.

Once you have a library installed, it should be this easy:

cl-user> (require :cl-ppcre)

If that's generating an error, it's possible that the Debian package has
problems. You could try using ASDF-INSTALL to install it:

cl-user> (require :asdf-install)
cl-user> (asdf-install:install :cl-ppcre)

Yes, after i use asdf-install and asdf:load-system, i can use it, still how asdf works...

Or you could try using Quicklisp:

$ wget http://beta.quicklisp.org/quicklisp.lisp
$ clisp
cluser> (load "quicklisp.lisp")
cluser> (ql:quickload :cl-ppcre
)

I will have a try, thanks for your response.