IN future, robots are replaced to these occupation human workers, they will bring advantages or disadvantages, e.g. restaurant waiter or cooker, shopping center customer servicer, cleaner, warehouse worker. Artificial intelligence had been developed to be applied to any service , working aspects, e.g. auto-driven cars. In the future, it may replace manual transport drivers in possible, e.g. non-manual driven tram, train, bus, taxi etc. public transport service. In factory warehouse environment, it can replace some workers to deliver any goods in warehouse. In shopping center service environment, it can replace security to do patrol jobs. In restaurant, it can replace waiter to deliver food to client's table. Why employers need artificial intelligence either assist or replace any office workers' tasks? Can AI only bring advantages to office working environment ? I shall indicate different kinds of industry office environment whether AI can bring only advantages or advantages and disadvantages to any kinds of office working envirnments. Readers can have more clear understanding whether AI is real suitable technologic tool to assist any office workers' tasks.