Camera system capable of expanding functions and an amount of video stream

A camera system comprising:

• a plurality of IP camera apparatuses, each of the plurality of IP camera apparatuses comprising:
• a base module, the base module comprising a control unit;
• a lens module connected to the base module, the control unit being adapted to analyze information acquired by the lens module;
• and
• a first connector disposed on the base module;
• and
• a central controlling apparatus, comprising:
• a plurality of holders whereon the plurality of IP camera apparatuses is respectively disposed, the base module being detachably disposed on one of the plurality of holders, the plurality of holders comprising a main holder and at least one auxiliary holder;
• a second connector disposed on the at least one holder to electrically connect to the first connector since the central controlling apparatus is assembled with the IP camera apparatus;
• and
• a controller electrically connected to the second connector, the controller being adapted to set an address for the IP camera apparatus via connection between the first connector and the second connector;
• wherein the IP camera apparatus disposed on the main holder is adapted to control function of the IP camera apparatus disposed on the auxiliary holder via the central controlling apparatus.