The excess existence of aluminum (Al3+) and phosphate (PO3-4) ions in the environment can be harmful to ecosystems and human health, highlighting the need for accurate and efficient monitoring.In this report, we have successfully synthesized a sulfone-based probe for relay detection of Al3+ and PO3-4 ions and characterized using various conventional methods.SBBD can selectively detect Al3+ions, with a fluorometric change from non-fluorescence to remarkable greenish fluorescence.Al3+ ions are well chelated with the SBBD enhancing an observable greenish fluorescence at 480 nm via the chelation-enhanced fluorescence (CHEF) process.Interestingly, SBBD can detect Al3+ ions in the nanomolar range (15 nM), this observed result comfortably meets with WHO regulation (3.7μM) for drinking water and allows a better chemosensor than other previous reported work.Moreover, on the appearance of PO3-4 ions, the greenish emission of the Al3+ ions chelated SBBD complex is quenched and these fluorescent "OFF-ON" based mechanism result helps us to demonstrate different types of mol. logic gates.Moreover, this sensing system could be used for on-site, trace level, and real-time rapid detection of Al3+ions.From these findings, we can conclude that SBBD may be utilized as a detection tool for cascade detection of Al3+ and PO3-4 ions for environmental monitoring.