Environmental monitoring device using smart phone

An environment monitoring device to be installed indoors or outdoors, the environment monitoring device comprising:

• a first case;
• a second case coupled to the first case;
• and
• a smart phone provided fixed in an inner space between the first case and the second case, wherein the smart phone is configured to measure a fine dust concentration around the environment monitoring device based on an image photographed with a camera, and display information on the measured fine dust concentration via a screen of the smart phone,
• wherein the first case comprises a first opening provided corresponding to the size of a screen of the smart phone to expose the screen of the smart phone to the outside;
• and
• the second case is coupled to the first case at the rear of the first case, and comprises a second opening provided corresponding to the camera of the smart phone,
• wherein the environment monitoring device comprises a smart phone support configured to fixedly support the smart phone between the first case and the second case,
• wherein the smart phone support includes:
• a first support provided with a third opening to allow the smart phone to be inserted thereinto and received therein;
• and
• a second support configured to support the smart phone in front of the first support, and provided with a fourth opening corresponding to the size of the screen of the smart phone.