In Bangladesh, the challenge of post-harvest loss of crops, especially of grains, creates significant challenges for stakeholders. Part of this challenge relates to insufficient crop storage systems that deliver stable environments that are conducive to grain storage avoiding infestations. This research illustrates a Smart Crop Storage System that delivers the capability to monitor critical environmental parameters like temperature, humidity, and CO2 level and alert the user when conditions are deemed unsafe. This is important because if the CO2 levels rise, it indicates spoilage or infestation of the grain and the alerts and ventilation will be kicked in to improve conditions. Moreover, there are ultrasonic sensors that emit a frequency of 40 kHz which potentially confuses insects as it acts as a repellent and there are buzzers that get triggered when larger pests are sensed beyond a fixed distance. The main premise includes an automatic exhaust fan, which kicks in based on internal temperature, essentially acting like a, environmental ventilator. This system should be affordable and effective for local needs of stakeholders as it combines IoT, automation, control, and alert/notifications in real time. Users can review all parameters live using the Blynk app which provides users awareness at all times and react if necessary. What distinguishes this research is the effectiveness of multiparametric capabilities.