How i can be watching AP devices in RB2011

hi all,
is there any way that i can be watching the AP devices that connected to RB2011 , and know the number of clients in each AP ?

With snmp you can do it. The OID is :

interface wireless print oid
client-count=.1.3.6.1.4.1.14988.1.1.1.3.1.6.9

You can monitor it with cacti or dude.

thanks man, but how i can do it with snmp , and what is snmp ?, forgive me , i am not very good in Mikrotik.

It’s nothing about mikrotik. Snmp is general monitoring protocol used by monitoring software.