In the Internet of Things(IoTs), the information is required to be fresh becomes, and transmitting of real-time information becomes more and more important. The Age of Information (AoI) is a metric proposed to evaluate the freshness of specific pieces of information, which has certain advantages in improving the timeliness of information in IoTs. The throughput and latency have been studied extensively in the IoTs, but research on the AoI of IoTs is quite novel. Aiming at improving the freshness of the information, this paper proposes a polling mechanism to reduce the access delay of packets and to improve the AoI of packets, such that the receiver can receive the latest messages. The simulation results show that this method has significant advantages in congested IEEE 802.11ah wireless LAN, such that it can reduce AoI of messages and increase the network throughput as well.