The invention discloses a hot-loadable distributed task scheduling and service monitoring system, which is used for solving the problems that the possibility that a task cannot be executed is increased and the service life of a host is influenced due to unreasonable distributed task scheduling distribution and more host tasks in the prior art. The system comprises an operation node module, a server, a data acquisition module, an analysis scheduling module, a log summarization module, a database, a monitoring early warning module and an operation and maintenance analysis module. A distributed task of an operation node is optimized and scheduled through an analysis scheduling module, and a scheduling value of the operation node is obtained through a formula; by calculating the scheduling value of the host, the tasks of the host can be reasonably arranged, and the possibility that the tasks cannot be executed due to more tasks of the host is avoided; the distributed tasks are reasonably distributed to other hosts to be executed, the task execution efficiency is improved, and the situation that the service life of the hosts is affected due to the large task execution amount of the hosts is avoided.