How to interpret 家居家装 in ...在服装配饰、护理美容、消费电子及家居家装这四大领域的产品上?
居 means to live, 装 means to decorate. 家居家装 in this sentence means the commodities or services related to furnitures, home-use devices, interior design and domestic decoration, that is, things you have to spend money on before you move into your new house.