Radio-Frequency Identification (RFID) nowadays has been widely used in a variety of fields such as manufacturing, transportation and healthcare, for identification, tracking, and information collection due to the simplicity and low cost of RFID tags. Existing RFID information collection protocols focus on information collection at a single reader, which aim to minimize the collision among RFID tags and the execution time for information collection. However, none of them consider reader scheduling to deal with the collision between neighboring readers that exists in multi-reader RFID systems. In this paper, we propose two reader scheduling schemes for time-efficient information collection in multi-reader RFID systems. The two proposed scheduling schemes can coordinate multiple readers to collect information simultaneously and ensure information from all tags is successfully collected with reader-reader collision. Extensive simulation results demonstrate the efficiency of the proposed reader scheduling schemes for multi-reader information collection.