Concept:
1.   This College is situated in Queens Island, Australia. so, Cangaroos in this logo represents Australia.
2.   Map of the Queens Island in shield shows that this college is in Queens Island. 
3.   Book on the base of map of shows that we prefer education as base of system rather than something else. 
4.  Crown show the prominance of Royal Queensisland International college over other competitors.
5.. Stars at the base of the logo refelct the high quality education system.
6.  World glob behind the Island map shows that this educational institute is working internationally.