The present invention relates to a street lamp system which uses LEDs to reduce power consumption, and uses an Internet terminal and an access point to enable VoIP communications even in an outdoor area. The street lamp system according to the present invention comprises: a light source which includes a plurality of street lamps, wherein each of the street lamps has one or more LEDs; a light source driving unit for driving the light source; an access point which carries out wireless communications with an Internet terminal, and which is connected to Internet; and a control unit which controls the light source driving unit to adjust the brightness of the light source when wireless communications between the Internet terminal and the access point are carried out.
