A display device for pets joined to a collar or the like of a pet to provide various information without being interrupted by movement of the pet include a housing member in which a space for installing a plurality of electronic components is formed, the housing member having a certain length in one direction, a display unit installed in the housing member to display various information, a switch module configured to turn on/off power of the display unit and change the information displayed on the display unit, a power module configured to perform charging using power from the outside, and supply power to the plurality of electronic components installed in the housing member, a sensor module including at least one sensor for measuring a condition of a pet, an animal information management module configured to store and manage information on the pet wearing the display device for pets, a satellite navigation receiver module configured to communicate with a navigation satellite at regular intervals to receive coordinate data on a location, and a communication module configured to transmit/receive the information displayed on the display unit while communicating with the outside.
