The invention discloses a monitoring method for cloud platform access equipment. The method includes the following steps: passing through a thread in a cloud platform with a preset monitoring period,and querying the upload time that equipment to be monitored uploads data to a database of the cloud platform for the last time; judging whether the difference between the current time and the upload time is greater than the monitoring period; and if yes, obtaining a monitoring result that the equipment to be monitored is in an offline state. Thereby, according to the monitoring method for the cloud platform access equipment disclosed by the invention, an online state of the equipment can be monitored through multiple threads, the monitoring period can meet simultaneous access of the multiple threads without conflicts, a simple structure, flexible configuration and high real-time performance can be achieved, and the online monitoring of the equipment in an Internet of things cloud platformcan be implemented. The invention also discloses a monitoring device for the cloud platform access equipment, the cloud platform used by the same, and a computer readable storage medium, which can also achieve the above technical effects.