Recently, the FPGA hardware tasks scheduling have become the focal study. Most of the existing papers researched on single objective optimal operation of reconfigurable assembly line. Although it can get the optimal result, it can spend the high cost in other aspects. Therefore, the single-objective is not an optimal scheme. In this propose, the authors embed the TGFF to the task graphs parameter format and produce the benchmark of task graph. They approach the Grey Decision Analysis Placement (GDAP) algorithm for multi-tasking scheduling to whole system in optimal performance from different work project.