Percutaneous　thermal　therapy　is　an　important　clinical　treatment　method　for　some　solid　tumors.　It　is　critical　to　use　effective　image　visualization　techniques　to　monitor　the　therapy　process　in　real　time　because　precise　control　of　the　therapeutic　zone　directly　affects　the　prognosis　of　tumor　treatment.　Ultrasound　is　used　in　thermal　therapy　monitoring　because　of　its　real-time,　non-invasive,　non-ionizing　radiation,　and　low-cost　characteristics.　This　paper　presents　a　review　of　nine　quantitative　ultrasound-based　methods　for　thermal　therapy　monitoring　and　their　advances　over　the　last　decade　since　2011.　These　methods　were　analyzed　and　compared　with　respect　to　two　applications:　ultrasonic　thermometry　and　ablation　zone　identification.　The　advantages　and　limitations　of　these　methods　were　compared　and　discussed,　and　future　developments　were　suggested.