Recently, Named Data Networking (NDN) has been proposed as a promising data delivery solution for smart building scenario because of its innovative properties such as name-based routing, in-network caching, and multi-source transmission. Due to the rapid growth in the number of devices and applications, it is difficult for NDN to meet the diverse transmission requirements only by leveraging the original forwarding strategy. To deal with this problem, we propose N-Guide, a novel protocol which not only supports all the transmission modes of applications but also implements the data aggregation in the scenario with large number of devices. Since our protocol directs the interest packets by the physical and application information in names just like a guide serving for the named data in smart buildings, we name it N-Guide. To verify the effectiveness of N-Guide, we make contrast simulations on ndnSIM. The results show that N-Guide outperforms two state-of-the-art NDN approaches.