Information providing method and device

The invention relates to an information providing method and device and belongs to the technical field of a wireless network. The method comprises the following steps: when detecting that access authentication information is modified, automatically obtaining the access authentication information obtained after modification; obtaining a device to be notified corresponding to the access authentication information obtained after modification; and providing the access authentication information obtained after modification to the device to be notified. According to the information providing method and device, through obtaining the access authentication information obtained after modification and the corresponding device to be notified, and actively providing the access authentication information obtained after modification to the device to be notified, the problems that in related technologies, a user needs to manually provide the access authentication information obtained after modification to an access device, so that the process where the access device obtains the access authentication information obtained after modification is complex and low in efficiency are solved; and the effect of providing the access authentication information obtained after modification to the specified access device in an easy and efficient manner is achieved.