Provided are a system and method for allocating a specific job or application to a specific slave core by using an inter-core-communication (ICC) channel and executing the job or application in a multicore system environment including the master core and a plurality of slave cores. The method of a master core, includes: initializing message transmission times; generating an event for processing a instruction received from an application program and generating a channel event message from the event; checking a process for transmitting the generated channel event message, and if a channel event message queue corresponding to an event transmitting request is not “FULL” of a previously-stored channel event message, transmitting the channel event message to a specific slave core to request for storing the channel event message; and returning a response of processing status to the request for storing the channel event message to the application program.