The invention relates to a children health monitoring and reminding system based on health management and a running method of the children health monitoring and reminding system based on health management. The children health monitoring and reminding system comprises a wearable device, an intelligent terminal and a cloud platform; the wearable device is used for collecting target data including physical sign information of children, environmental information and current geographical location information and transmitting the target data out; the intelligent terminal is used for receiving input target information including personal information of the children and transmitting the target information out, and used for receiving reminding information coming from the cloud platform and comprising children health monitoring situations; the cloud platform is used for receiving the target information and the target data and judging whether various data in the target data are within a preset safety threshold range or not, the reminding information is generated if the data in the target data are not within the preset safety threshold range and/or is generated according to the target information, and the reminding information is transmitted to the intelligent terminal. By means of the children health monitoring and reminding system and the running method, the collected target data and the target information input by a user are processed, the reminding information can be generated, and the user can be reminded to pay attention to corresponding items.