The environmental monitor can better protect the whole process of pregnant women from pregnancy preparation to delivery, and reduce the harm to pregnant women and fetuses. The product can monitor ultraviolet rays, toxic and harmful gases, PM2.5, electromagnetic radiation monitoring, etc., so that pregnant women can quickly understand the surrounding environment in time, thereby adjusting their body state and position, and protecting themselves and the fetus. At the same time, it provides scientific and accurate health guidance for pregnant women in combination with APP application. The product is small in size, round in shape, soft in plastic around the body, extremely affinity, easier to carry the hanging ring, and easier to identify the breathing light status display.