A software deployment method includes: analyzing a source code of an application; designating off-loadable processes of the application; performing a code conversion of the application according to a deployment destination environment; measuring the performance of the converted application on a verification device; making a setting for resource amounts according to the deployment destination environment; selecting a deployment place by calculating a deployment destination on the basis of a performance and a cost when the converted application is deployed while ensuring the resource amounts; performing, after deployment to an actual environment, a performance measurement test process to measure an actual performance of application; and performing, after performing the performance measurement test process, one or more of performing the code conversion, making the setting for resource amounts, selecting the deployment place, measuring the performance of the application on the verification device, and performing the performance measurement test process.