Rainwater filtering device and monitoring system therefor

A rainwater filtering device comprising:

• a filtering unit including a strainer therein;
• a first overflow preventing unit supported by a first compression rod and installed above the filtering unit;
• a pre-treating unit installed in front of an inlet of the filtering unit in order to pre-treat rainwater introduced into the filtering unit;
• and a second overflow preventing unit supported by a second compression rod and installed above the pre-treating unit, wherein the filtering unit includes:
• a connection ring hooked onto a third compression rod to support one end of the filtering unit;
• a connection member connected to a fourth compression rod supporting the first overflow preventing unit to support the other end of the filtering unit;
• and a guide fixing plate including a lower fixing plate and a pair of side fixing plates installed at the inlet of the filtering unit to fix the strainer.