Hello again.
After turnovers, I noticed that by disabling URL friendly in "shop parameters >teraffic and seo" , category and sub-category images were displayed well.
I remove .htaccess on PrestaShop root, clear cache, and enable url friendly. problem appears again!
Now I have 2 option:
1- disable url friendly,To have categories images.
2- enable url friendly and good link for seo but not show category images
I prefer 2 butI 'm still searching.