The invention discloses a system monitoring method based on a cloud platform and belongs to the computer technology field. Two ways such as 'Automatic discovery' and by-hand input are used for configuring configuration parameters of monitored objects in data acquisition of managed resources, and performance data is acquired by multiple acquisition ways such as SNMP Agent, Telnet, Vast data-MAS Agent, Http (Hyper Text Transport Protocol), ICMP (Internet Control Messages Protocol), TCP (Transmission Control Protocol) and IDBC (Internet Data Base Connection) via an active turning mechanism; warning messages and data from a third-party managing tool and a private user system are integrated and received by multiple ways; data is collected by a VASTDATE-MAS collecting and scheduling module and compared with a preset system threshold, and perfect event triggering, inquiring, informing, processing, and statistic analysis functions can be provided by the VASTDATE-MAS event and an informing module; the system monitoring method is easy to deploy, can realize plug and play and one-touch application.