How can I change my badge when the sweat drops from the pickup hall?

You can redeem badges in the Badge Manager.

After getting the hard sweat, click Map-Advertising-North Square-Badge Manager-Select Redeem Badge-Redeem Successfully.

No pains, no gains. Planting crops in the pickup hall requires watering and spraying once an hour. Harvest in a state of total nutrition and luck, and you will get hard sweat drops.