Dear @Knidia,

i have outdoor cpe210  connected to my wifi modem located at the roof of my depot and facing to my room 100 meters away

100 meters away in my room its very week signal

i like to mount an adaptor in my room to get good signal strenght

Buy a second CPE210 and add an access point in your room to share the wifi signal. The setup is like this,

WiFi Modem ----- CPE210 AP )))((( CPE210 Client ----- access point in your room )))((( wireless clients

Dear @Knidia,

second cpe210 will be mounted at the outer corner of my room and cat6 cable will go in the room ,

both cpe s should be facing each other 

is that correct ?

then in the room what should i attach to the cat 6 getting in from the cpe ?

Correct. Both CPEs should be facing each other. In the room, you can connect an access point (or a wifi router) to the LAN port of the injector from the CPE (the PoE port of the injector will be connected to the CPE for power).

Dear @Knidia,

i also have an antenna tp--ant2409A

Do you think it can be usefull in this operation ?

I don't think so. The TL-ANT2409A is an external directional antenna, which needs to cooperate with a wireless device such as an access point or routers, it cannot work alone. For your reference, you may read this Introduction for TP-Link outdoor antennas.