Hi
I'd like to show user profile page of k2 ,but it shows the profile page of joomla,
I have two menu one of them set to Edit User Profile that shows the edit page of k2 correctly
and another that set User Profile that shows the default profile of joomla but I want that shows the profile of k2

Hi. You need to change your menu link to K2 user blog.

but if I set menu to userblog, I must select a specific user for that page,
But I want every user have own profile page.

Then you need to use the K2 Users module. This will display a list of your users depending on the settings of the module.