Abstract: Our country has a vast sea area, long coastline, and abundant offshore wind energy resources, giving offshore wind power broad development prospects and making it crucial for energy transition. However, in complex marine environments, pile foundations alter the flow field, causing local scour and affecting structural safety and stability. Although there are many methods to monitor underwater structure scour, they have limitations in complex marine environments, making real-time monitoring challenging. In this article, a forward method for monitoring scour holes in offshore wind turbine foundations was established based on acoustic equations,and the wave field characteristics of the scour hole model were analyzed. On this basis,a linear observation system was proposed for monitoring the development process of the scour hole. The inverse time migration imaging method was used to achieve surface interface imaging of the scour hole.The numerical simulation results indicate that this method has good imaging effect for scour holes of different scales and shapes. offshore wind power foundation scour realtime monitoring reverse time migration imaging