The present invention provides a method for allocating and managing a cluster resource on a cloud platform, the method comprising the steps of: generating service group information, by means of a cloud platform system, when a cluster resource allocation request is input; adding/deleting a user of the service group; selecting a cluster to be allocated to the user of the service group and inputting allocation information; querying a cluster resource availability; registering resource allocation information in the service group and allocating a resource to complete cluster resource allocation, when the resource is available as a result of the querying of the cluster resource availability; checking whether a cluster resource can be added when the resource is insufficient as a result of the querying of the cluster resource availability; registering the further cluster resource when the cluster resource can be added; registering resource allocation information in the service group and allocating the resource to complete cluster resource allocation; and reselecting an available cluster when the cluster resource cannot be added.