To provide a garbage disposal facility and a garbage disposal method by which a magnetic material (iron oxide) in incineration ash subjected to a landfill disposal conventionally can be reused.

The garbage disposal facility includes: a garbage incinerator 2: a magnetic sorter 4 for magnetically sorting the magnetic material from the incineration ash discharged from the garbage incinerator 2; and a reduction furnace 15 for executing reduction metallization treatment of the magnetic material sorted by the magnetic sorter 4. Also, the garbage disposal method includes: a process of executing incineration of combustible garbage in the garbage incinerator; a magnetic sorting process of magnetically sorting the magnetic material from the incineration ash discharged from the garbage incinerator; and a process of executing the reduction metallization treatment of the magnetic material sorted by the magnetic sorting process in the reduction furnace. The iron oxide (magnetic material) which has been conventionally filled in the land is made reusable by executing reduction treatment.