PURPOSE: To improve efficiency for managing sanitary of a residential space and to save labor for cleaning.

CONSTITUTION: At each nozzle inserting port 1 of a central cleaner, a POWER information control processing part 5 collects the information on cleaning such as the ON/OFF of POWER and the date and time through an air speed sensor 6, a timer processing part 2 measures the lapse of time from the final cleaning date and time shown by POWER OFF information receiving time, and level information expressing the necessity of cleaning corresponding to the lapse of time is displayed through an LED control processing part 3 onto an LED 4. In that case, the correspondence of the lapse of time from the final cleaning date and time and the level information expressing the necessity of cleaning is changed corresponding to the use frequency of the residential space.