The invention relates to a radio frequency based control system for preventing occupational hazards, comprising a communication network that connects one or more workers with one or more managers via the Internet or a mobile network, and one or more servers and databases connected to that communication network, further comprising: a plurality of RF tags attached to objects or tools used by workers during their work activity, said tags comprising means for data transmission through radio frequency; and one or more portable mobile terminals, configured for being equipped by workers and for receiving data transmitted by the RF tags, said mobile terminals comprising Internet connectivity and/or mobile network connectivity; and one or more management devices connected to the Internet and/or to a mobile network for receiving transmitted data by mobile terminals and/or recorded or analysed by the servers.