An image-based animal object detection apparatus includes: a communication module; a memory that stores therein a program configured to extract animal detection information; and a processor that executes the program. Herein, the program configured to extract animal detection information extracts the animal detection information by inputting received image into an animal detection model that is trained based on learning data composed of animal images. The animal detection information includes, as information about a bounding box created to be suitable for an animal object detected from the image, coordinates of a central point, a width and a length of the bounding box and a rotational angle of the bounding box, and includes, a position information indicating keypoints of the animal object.