In accordance with the characteristics in the transitional period of the Qiongzhou Strait submarine cable route monitoring system, this paper introduces a modeling approach based on timed colored Petri Nets and also designed a specific model. Tasks of the model are classified according to different detecting tasks and similar tasks are assigned together, which are realized by setting up token color sets in the model. An approach ofmodeling is discussed in this paper, which also analyzes the running characteristics of the model. It illustrates that the modeling approach satisfies the design demands.