Abstract: In a burstable instance recommendation server including a processor, and providing information on a burstable instance provided by a public cloud, the burstable instance being a candidate to which a predetermined instance under utilization is migrated, the processor identifies a first candidate burstable instance provided by the public cloud based on performance time series data of the instance under utilization. The processor calculates high load performance time series data in which occurrence of a load higher than in the performance time series data is estimated on the identified first candidate burstable instance, and the processor calculates a penalty in case of the high load performance time series data. The processor recognizably displays a cost of the first candidate burstable instance and the penalty.