Large gatherings pose serious problems for crowd safety and raise security concerns for the organizers. Estimating the crowd counting in a single image is very important for crowd control and crowd safety. In this study, we try to figure out the density level of people in real-time by counting the number of person with resort image of YouTube live camera. YOLOv5 was used to detect the person. As a result of comparing the YOLOv5x trained with the resort image and the YOLOv5x6 model trained with the COCO dataset, the proposed YOLOv5x custom model well detected the pattern for the change in the number of person. The results of counted by real-time are summarized in graphs and tables to detect the density level of people. The person detection and summary results were applied to a monitoring system that observes the change in the number of person over time. The presented dashboard can check real-time images, detection result images and changes in crowding. In addition, notification messages and images are sent to the mobile device, so administrators will be able to quickly check the situation.