Yes, Beijing One Card can be used to take the subway. Beijing subway uses IC card payment system, and Beijing smart card is an IC card, which can be used to pay for subway, bus, taxi, bus, bicycle and other expenses.

When taking the subway, you only need to swipe the Beijing card on the gate card reader of the station to complete the operation of entering and leaving the station, and the system will automatically deduct the corresponding fare from the card.

It should be noted that at present, the subway station uses the "one card" (including the Beijing-Tianjin-Hebei traffic co-branded card) payment system launched by Beijing One Card Company. If you use other types of smart cards, you may not be able to pay the subway fare, so you should know clearly in advance.