Abstract: The present disclosure relates to a health care system for companion animals and a method of operating the same. The health care system according to one embodiment of the present disclosure includes a data collector for collecting lifelog data including basic information and biometric information about a user's companion animal; a self-diagnosis device for providing a plurality of questionnaire data to the user to perform self-diagnosis of the health condition of the companion animal and receiving feedback information reflecting a response of the user to the provided questionnaire data from the user; a health condition judgment device for judging the health condition of the companion animal based on the collected lifelog data and the feedback information; and a service determining device for determining at least one health care service to be provided to the user among a health coaching service and a medical service based on the judged health condition.