The invention relates to a system for monitoring the dampness load of real estate, comprising at least one measuring module, a plurality of measurement modules preferably, each measurement module and comprises a temperature sensor comprises at least one spatial air dampness sensor, by means of which the temperature can be measured on or close to that mounting surface, on which the measuring module is mounted and has electronics, the is furnished, as well as the date of the measurement values at least of measured temperature and measurements at time intervals to detect spatial air dampness and to send at least one to the at least one separate database by telecommunications and for storing the measurement values of a respective measuring module measuring module, by telecommunications are dispatched by the measurement module.