diff --git a/app/controllers/groups_controller.rb b/app/controllers/groups_controller.rb
new file mode 100644
--- /dev/null
+++ b/app/controllers/groups_controller.rb
@@ -0,0 +1,104 @@
+class GroupsController < ApplicationController
+  before_action :set_group, only: [:show, :edit, :update, :destroy,
+                                   :add_user, :remove_user,:remove_all_user,
+                                   :add_problem, :remove_problem,:remove_all_problem,
+                                  ]
+  before_action :authenticate, :admin_authorization
+
+  # GET /groups
+  def index
+    @groups = Group.all
+  end
+
+  # GET /groups/1
+  def show
+  end
+
+  # GET /groups/new
+  def new
+    @group = Group.new
+  end
+
+  # GET /groups/1/edit
+  def edit
+  end
+
+  # POST /groups
+  def create
+    @group = Group.new(group_params)
+
+    if @group.save
+      redirect_to @group, notice: 'Group was successfully created.'
+    else
+      render :new
+    end
+  end
+
+  # PATCH/PUT /groups/1
+  def update
+    if @group.update(group_params)
+      redirect_to @group, notice: 'Group was successfully updated.'
+    else
+      render :edit
+    end
+  end
+
+  # DELETE /groups/1
+  def destroy
+    @group.destroy
+    redirect_to groups_url, notice: 'Group was successfully destroyed.'
+  end
+
+  def remove_user
+    user = User.find(params[:user_id])
+    @group.users.delete(user)
+    redirect_to group_path(@group), flash: {success: "User #{user.login} was removed from the group #{@group.name}"}
+  end
+
+  def remove_all_user
+    @group.users.clear
+    redirect_to group_path(@group), alert: 'All users removed'
+  end
+
+  def remove_all_problem
+    @group.problems.clear
+    redirect_to group_path(@group), alert: 'All problems removed'
+  end
+
+  def add_user
+    user = User.find(params[:user_id])
+    begin
+      @group.users << user
+      redirect_to group_path(@group), flash: { success: "User #{user.login} was add to the group #{@group.name}"}
+    rescue => e
+      redirect_to group_path(@group), alert: e.message
+    end
+  end
+
+  def remove_problem
+    problem = Problem.find(params[:problem_id])
+    @group.problems.delete(problem)
+    redirect_to group_path(@group), flash: {success: "Problem #{problem.name} was removed from the group #{@group.name}" }
+  end
+
+  def add_problem
+    problem = Problem.find(params[:problem_id])
+    begin
+      @group.problems << problem
+      redirect_to group_path(@group), flash: {success: "Problem #{problem.name} was add to the group #{@group.name}" }
+    rescue => e
+      redirect_to group_path(@group), alert: e.message
+    end
+  end
+
+  private
+    # Use callbacks to share common setup or constraints between actions.
+    def set_group
+      @group = Group.find(params[:id])
+    end
+
+    # Only allow a trusted parameter "white list" through.
+    def group_params
+      params.require(:group).permit(:name, :description)
+    end
+end