Abstract: This invention refers to a system and a method of television audience measurements in real time through analysis of the content transmitted by the television broadcasting stations. The system hereby proposed includes a medium of detection of change of tuning state (2) of a television set (1), a means of generation of subscriptions (3) that generates subscriptions containing information on the content emitted by the television set obtained from the detection of change in the tuning state of the television set (1), a management device (30), a means of remittance of subscriptions (4) and an audience central, wherein the medium of remittance of subscriptions (4) sends the subscriptions generated by the medium of generation of subscriptions (3) to the audience central every time the said medium of detection (2) detects a change in the tuning state of the television set (1). This system is structurally simple and allows the measurement of television audience in real time quickly and at a relatively low cost.