InfoField aims to seamlessly connect physical space with the ubiquitous network, helping users select information in a dense RFID-tagged environment. The system uses a wearable RFID reader that monitors every tag within range (~1.5m), and sensor-embedded RFID tags which provide orientation, light level, and proximity data along with their identification codes. InfoField derives the user's interactions with the corresponding host object from the sensor data and enables browsing, logging, and selecting of the physical object's data. This system, fully compatible with EPC protocol, expands the RFID application area, including location tracking, inventory monitoring, activity logging, physical manipulation of data, and recommender systems.