Method for monitoring and/or regulating the injection casting in injection casting machines by measuring the temperature of the injection mould. A heat sensor is introduced into a hole of the mould against the moulding cavity surface, so close to it that the temperature variations resulting from injection cycles may be recorded by the heat sensor. The results of the measurements are monitored as to the admissible maximum deviations, and it is appropriate to monitor the minimum temperature and the temperature difference between the maximum temperature and the minimum temperature. When exceeding predetermined maximum tolerances, a signal to control a quality point is actuated for the sorting of parts and/or a light signal, respectively an acoustic signal is emitted and/or the casting machine is disconnected. Furthermore, the measuring signals are used to regulate the mould temperature and the mass temperature. In multicavity moulds, the complete filling of each moulding cavity is monitored.