The present invention relates to an infrared detection countermeasure system for enabling concealment of objects from identification by thermal imaging night vision systems and/or for deception of heat seeking missiles. The system comprises a screen formed of at least one thermoelectric module, couplable to a target object, a controller for controlling the thermoelectric module, at least two temperature sensors for measuring ambient temperature and temperature of one side of the thermoelectric module and providing an indication of the temperature to the controller, and a power source coupled to the thermoelectric module. The controller is coupled to the power source for causing the power source to provide a level of power, selected in accordance with the temperature indications, to the thermoelectric module so as to generate a selected temperature in at least part of said screen.