The dog defense service is mainly through the use of security personnel in conjunction with the use of guard dogs and detonation dogs. It is also important for key objectives such as building yards, large-scale warehousing, factories and mines, and field sites, key gates such as airports and stations, and events such as exhibitions, performances and events. Security and risk investigation. Guard dogs can perform tasks such as guarding, patrolling and escort for key protection areas, prevention of difficult places, and single targets. The detection of dangerous articles by smelling dogs is one of the most effective methods for on-site search.